Mount Rainier, Washington
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Mount Rainier (), indigenously known as Tahoma, Tacoma, Tacobet, or təqʷubəʔ, is a large active stratovolcano in the Cascade Range of the
Pacific Northwest The Pacific Northwest (sometimes Cascadia, or simply abbreviated as PNW) is a geographic region in western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Tho ...
, located in
Mount Rainier National Park Mount Rainier National Park is an American national park located in southeast Pierce County and northeast Lewis County in Washington state. The park was established on March 2, 1899, as the fourth national park in the United States, preservi ...
about south-southeast of
Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest regio ...
. With a summit elevation of , it is the highest mountain in the U.S. state of
Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...
and the Cascade Range, the most topographically prominent mountain in the contiguous United States, and the tallest in the
Cascade Volcanic Arc The Cascade Volcanoes (also known as the Cascade Volcanic Arc or the Cascade Arc) are a number of volcanoes in a volcanic arc in western North America, extending from southwestern British Columbia through Washington and Oregon to Northern Calif ...
. Due to its high probability of eruption in the near future, Mount Rainier is considered one of the most dangerous volcanoes in the world, and it is on the
Decade Volcano The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) as being worthy of particular study in light of their history of large, destructive eruptions and prox ...
list. The large amount of glacial ice means that Mount Rainier could produce massive lahars that could threaten the entire
Puyallup River The Puyallup River ( ) is a river in the U.S. state of Washington. About long, it is formed by glaciers on the west side of Mount Rainier. It flows generally northwest, emptying into Commencement Bay, part of Puget Sound. The river and its tribu ...
valley. According to the
United States Geological Survey The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, ...
, "about 80,000 people and their homes are at risk in Mount Rainier's lahar-hazard zones." Between 1950 and 2018, 439,460 people climbed Mount Rainier. Approximately 84 people died in mountaineering accidents on Mount Rainier from 1947 to 2018.


Name

Mount Rainier was first known by the local Salishan speakers as ''Talol'', ''Tacoma'', or ''Tahoma''. One hypothesis of the word origin is 'mother of waters' in the
Lushootseed language Lushootseed (txʷəlšucid, dxʷləšúcid), also Puget Salish, Puget Sound Salish or Skagit-Nisqually, is a language made up of a dialect continuum of several Salish tribes of modern-day Washington state. Lushootseed is one of the Coast Salis ...
spoken by the Puyallup people. The linguist
William Bright William O. Bright (August 13, 1928 – October 15, 2006) was an American linguist and toponymist who specialized in Native American and South Asian languages and descriptive linguistics. Biography Bright earned a bachelor's degree in lingui ...
gives the origin as 'snow-covered mountain'. Another hypothesis is that Tacoma means "larger than
Mount Baker Mount Baker (Lummi: '; nok, Kw’eq Smaenit or '), also known as Koma Kulshan or simply Kulshan, is a active glacier-covered andesitic stratovolcano in the Cascade Volcanic Arc and the North Cascades of Washington in the United States. Mount ...
" in Lushootseed: ''Ta'' 'larger', plus ''Koma'' (''Kulshan''), (Mount Baker). Other names originally used include Tahoma, Tacobeh, and Pooskaus. The current name was given by George Vancouver, who named it in honor of his friend, Rear Admiral Peter Rainier. The map of the Lewis and Clark expedition of 1804–1806 refers to it as "Mt. Regniere". Although Rainier had been considered the official name of the mountain,
Theodore Winthrop Major Theodore Woolsey Winthrop (September 22, 1828 – June 10, 1861) was a writer, lawyer, and world traveller. He was one of the first Union officers killed in the American Civil War. Biography Winthrop was born in New Haven, Connecticut ...
, in his posthumously published 1862 travel book ''The Canoe and the Saddle'', referred to the mountain as Tacoma and for a time, both names were used interchangeably, although Mt. Tacoma was preferred in the nearby city of Tacoma. In 1890, the United States Board on Geographic Names declared that the mountain would be known as Rainier. Following this in 1897, the Pacific Forest Reserve became the Mount Rainier Forest Reserve, and the national park was established three years later. Despite this, there was still a movement to change the mountain's name to Tacoma and Congress was still considering a resolution to change the name as late as 1924. After the 2015 restoration of the original name
Denali Denali (; also known as Mount McKinley, its former official name) is the highest mountain peak in North America, with a summit elevation of above sea level. With a topographic prominence of and a topographic isolation of , Denali is the th ...
from Mount McKinley in Alaska, debate over Mount Rainier's name intensified.


Geographical setting

Mount Rainier is the tallest mountain in Washington and the Cascade Range. This peak is located just east of Eatonville and just southeast of Tacoma and Seattle. Mount Rainier is ranked third of the 128 ultra-prominent mountain peaks of the United States. Mount Rainier has a
topographic prominence In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
of , which is greater than that of K2, the world's second-tallest mountain, at . On clear days it dominates the southeastern horizon in most of the
Seattle-Tacoma metropolitan area The Seattle metropolitan area is an urban conglomeration in the U.S. state of Washington that comprises Seattle, its surrounding satellites and suburbs. It contains the three most populous counties in the state—King, Snohomish, and Pierce ...
to such an extent that locals sometimes refer to it simply as "the Mountain". On days of exceptional clarity, it can also be seen from as far away as Corvallis, Oregon (at Marys Peak), and
Victoria, British Columbia Victoria is the capital city of the Canadian province of British Columbia, on the southern tip of Vancouver Island off Canada's Pacific coast. The city has a population of 91,867, and the Greater Victoria area has a population of 397,237. The ...
. With 26 major
glacier A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as ...
s and of permanent
snowfield A snow field, snowfield or neve is an accumulation of permanent snow and ice, typically found above the snow line, normally in mountainous and glacial terrain. Glaciers originate in snowfields. The lower end of a glacier is usually free from ...
s and glaciers, Mount Rainier is the most heavily
glaciated A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as ...
peak in the lower 48 states. The summit is topped by two
volcanic crater A volcanic crater is an approximately circular depression in the ground caused by volcanic activity. It is typically a bowl-shaped feature containing one or more vents. During volcanic eruptions, molten magma and volcanic gases rise from an und ...
s, each more than in diameter, with the larger east crater overlapping the west crater. Geothermal heat from the
volcano A volcano is a rupture in the Crust (geology), crust of a Planet#Planetary-mass objects, planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and volcanic gas, gases to escape from a magma chamber below the surface. On Ear ...
keeps areas of both crater rims free of snow and ice, and has formed the world's largest volcanic
glacier cave A glacier cave is a cave formed within the ice of a glacier. Glacier caves are often called ice caves, but the latter term is properly used to describe bedrock caves that contain year-round ice. Overview Most glacier caves are started by wat ...
network within the ice-filled craters, with nearly of passages. A small
crater lake Crater Lake ( Klamath: ''Giiwas'') is a volcanic crater lake in south-central Oregon in the western United States. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity. The lake partly fill ...
about in size and deep, the highest in North America with a surface elevation of , occupies the lowest portion of the west crater below more than of ice and is accessible only via the caves. The
Carbon Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon mak ...
, Puyallup, Mowich, Nisqually, and
Cowlitz River The Cowlitz River is a river in the state of Washington in the United States, a tributary of the Columbia River. Its tributaries drain a large region including the slopes of Mount Rainier, Mount Adams, and Mount St. Helens. The Cowlitz has a d ...
s begin at eponymous glaciers of Mount Rainier. The sources of the White River are Winthrop, Emmons, and
Fryingpan Glacier Fryingpan Glacier is on the eastern face of the Little Tahoma Peak, just to the east of Mount Rainier in the U.S. state of Washington. The glacier is located on top of a cliff from the Emmons Glacier to the north and a small ridge separates this ...
s. The White, Carbon, and Mowich join the Puyallup River, which discharges into
Commencement Bay Commencement Bay is a bay of Puget Sound in the U.S. state of Washington. The city of Tacoma is located on the bay, with the Port of Tacoma occupying the southeastern end. A line drawn from Point Defiance in the southwest to Browns Point in ...
at Tacoma; the Nisqually empties into Puget Sound east of Lacey; and the Cowlitz joins the Columbia River between Kelso and Longview.


Subsidiary peaks

The broad top of Mount Rainier contains three named summits. The highest is called the Columbia Crest. The second highest summit is Point Success, , at the southern edge of the summit plateau, atop the ridge known as Success Cleaver. It has a
topographic prominence In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
of about , so it is not considered a separate peak. The lowest of the three summits is Liberty Cap, , at the northwestern edge, which overlooks Liberty Ridge, the Sunset Amphitheater, and the dramatic Willis Wall. Liberty Cap has a prominence of , and so would qualify as a separate peak under most strictly prominence-based rules. A prominence cutoff of is commonly used in Washington state. High on the eastern flank of Mount Rainier is a peak known as
Little Tahoma Peak Little Tahoma Peak, also called Little Tahoma, is a satellite peak of Mount Rainier in Pierce County, Washington and in Mount Rainier National Park. It is quite noticeable from Seattle over away. Little Tahoma Peak is a volcanic remnant. It ...
, , an eroded remnant of the earlier, much higher, Mount Rainier. It has a prominence of , and it is almost never climbed in direct conjunction with Columbia Crest, so it is usually considered a separate peak. If considered separately from Mount Rainier, Little Tahoma Peak would be the third highest mountain peak in Washington.


Geology

Mount Rainier is a stratovolcano in the
Cascade Volcanic Arc The Cascade Volcanoes (also known as the Cascade Volcanic Arc or the Cascade Arc) are a number of volcanoes in a volcanic arc in western North America, extending from southwestern British Columbia through Washington and Oregon to Northern Calif ...
that consists of lava flows,
debris flow Debris flows are geological phenomena in which water-laden masses of soil and fragmented rock rush down mountainsides, funnel into stream channels, entrain objects in their paths, and form thick, muddy deposits on valley floors. They generally ...
s, and pyroclastic ejecta and flows. Its early
volcanic A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates a ...
deposits are estimated at more than 840,000 years old and are part of the Lily Formation (about 2.9 million to 840,000 years ago). The early deposits formed a "proto-Rainier" or an ancestral cone prior to the present-day cone. The present cone is more than 500,000 years old. The volcano is highly eroded, with glaciers on its slopes, and appears to be made mostly of
andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predo ...
. Rainier likely once stood even higher than today at about before a major debris
avalanche An avalanche is a rapid flow of snow down a slope, such as a hill or mountain. Avalanches can be set off spontaneously, by such factors as increased precipitation or snowpack weakening, or by external means such as humans, animals, and eart ...
and the resulting
Osceola Mudflow The Osceola Mudflow, also known as the Osceola Lahar, was a lahar in the U.S. state of Washington that descended from the summit and northeast slope of Mount Rainier during a period of eruptions about 5,600 years ago. It traveled down the west ...
approximately 5,000 years ago. In the past, Rainier has had large debris avalanches, and has also produced enormous lahars (
volcanic A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates a ...
mudflow A mudflow or mud flow is a form of mass wasting involving fast-moving flow of debris that has become liquified by the addition of water. Such flows can move at speeds ranging from 3 meters/minute to 5 meters/second. Mudflows contain a significa ...
s), due to the large amount of glacial ice present. Its lahars have reached all the way to
Puget Sound Puget Sound ( ) is a sound of the Pacific Northwest, an inlet of the Pacific Ocean, and part of the Salish Sea. It is located along the northwestern coast of the U.S. state of Washington. It is a complex estuarine system of interconnected ma ...
, a distance of more than . Around 5,000 years ago, a large chunk of the volcano slid away and that debris avalanche helped to produce the massive Osceola Mudflow, which went all the way to the site of present-day Tacoma and south Seattle. This massive avalanche of rock and ice removed the top of Rainier, bringing its height down to around . About 530 to 550 years ago, the occurred, although this was not as large-scale as the Osceola Mudflow. After the major collapse approximately 5,000 years ago, subsequent eruptions of lava and
tephra Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, they re ...
built up the modern summit cone until about as recently as 1,000 years ago. As many as 11
Holocene The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togeth ...
tephra layers have been found. Soils on Mount Rainier are mostly gravelly ashy sandy loams developed from colluvium or glacial till mixed with volcanic tephra. Under forest cover their profiles usually have the banded appearance of a classic
podzol In soil science, podzols are the typical soils of coniferous or boreal forests and also the typical soils of eucalypt forests and heathlands in southern Australia. In Western Europe, podzols develop on heathland, which is often a construct of ...
but the E horizon is darker than usual. Under meadows a thick dark A horizon usually forms the topsoil.


Modern activity and threat

The most recent recorded
volcanic eruption Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are oft ...
was between 1820 and 1854, but many eyewitnesses reported eruptive activity in 1858, 1870, 1879, 1882, and 1894 as well. Seismic monitors have been placed in Mount Rainier National Park and on the mountain itself to monitor activity. An eruption could be deadly for all living in areas within the immediate vicinity of the volcano and an eruption would also cause trouble from
Vancouver, British Columbia, Canada Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the most populous city in the province, the 2021 Canadian census recorded 662,248 people in the city, up from 631,486 in 2016. The ...
to
San Francisco San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17th ...
,
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
because of the massive amounts of ash blasting out of the volcano into the atmosphere. Mount Rainier is located in an area that itself is part of the eastern rim of the
Pacific Ring of Fire The Ring of Fire (also known as the Pacific Ring of Fire, the Rim of Fire, the Girdle of Fire or the Circum-Pacific belt) is a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur. The Ring o ...
. This includes mountains and calderas like
Mount Shasta Mount Shasta ( Shasta: ''Waka-nunee-Tuki-wuki''; Karuk: ''Úytaahkoo'') is a potentially active volcano at the southern end of the Cascade Range in Siskiyou County, California. At an elevation of , it is the second-highest peak in the Cascades ...
and
Lassen Peak Lassen Peak ( ), commonly referred to as Mount Lassen, is a lava dome volcano and the southernmost active volcano in the Cascade Range of the Western United States. Located in the Shasta Cascade region of Northern California, it is part of the ...
in California,
Crater Lake Crater Lake ( Klamath: ''Giiwas'') is a volcanic crater lake in south-central Oregon in the western United States. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity. The lake partly fill ...
, Three Sisters, and Mount Hood in Oregon,
Mount St. Helens Mount St. Helens (known as Lawetlat'la to the indigenous Cowlitz people, and Loowit or Louwala-Clough to the Klickitat) is an active stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United St ...
, Mount Adams,
Glacier Peak Glacier Peak or Dakobed (known in the Sauk-Suiattle dialect of the Lushootseed language as "Tda-ko-buh-ba" or "Takobia") is the most isolated of the five major stratovolcanoes (composite volcanoes) of the Cascade Volcanic Arc in the U.S state ...
, and
Mount Baker Mount Baker (Lummi: '; nok, Kw’eq Smaenit or '), also known as Koma Kulshan or simply Kulshan, is a active glacier-covered andesitic stratovolcano in the Cascade Volcanic Arc and the North Cascades of Washington in the United States. Mount ...
in Washington, and
Mount Cayley Mount Cayley is an eroded but potentially active stratovolcano in the Pacific Ranges of southwestern British Columbia, Canada. Located north of Squamish and west of Whistler, the volcano resides on the edge of the Powder Mountain Icefield. ...
,
Mount Garibaldi Mount Garibaldi (known as Nch'kaý to the indigenous Squamish people) is a dormant stratovolcano in the Garibaldi Ranges of the Pacific Ranges in southwestern British Columbia, Canada. It has a maximum elevation of and rises above the surroun ...
,
Silverthrone Caldera The Silverthrone Caldera is a potentially active caldera complex in southwestern British Columbia, Canada, located over northwest of the city of Vancouver and about west of Mount Waddington in the Pacific Ranges of the Coast Mountains. The cald ...
, and Mount Meager in
British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...
. All of the above are dormant, but could return to activity, and scientists on both sides of the border gather research of the past eruptions of each in order to predict how mountains in this arc will behave and what they are capable of in the future, including Mount Rainier. Of these, only two have erupted since the beginning of the twentieth century: Lassen in 1915 and St. Helens in 1980 and 2004. However, past eruptions in this volcanic arc have multiple examples of sub-plinian eruptions or higher: Crater Lake's last eruption as Mount Mazama was large enough to cause its cone to collapse, and Mount Rainier's closest neighbor, Mount St. Helens, produced the largest eruption in the continental United States when it erupted in 1980. Statistics place the likelihood of a major eruption in the Cascade Range at 2–3 per century. Mount Rainier is listed as a
Decade Volcano The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) as being worthy of particular study in light of their history of large, destructive eruptions and prox ...
, or one of the 16 volcanoes with the greatest likelihood of causing loss of life and property if eruptive activity resumes. If Mount Rainier were to erupt as powerfully as Mount St. Helens did in its May 18, 1980 eruption, the effect would be cumulatively greater, because of the far more massive amounts of glacial ice locked on the
volcano A volcano is a rupture in the Crust (geology), crust of a Planet#Planetary-mass objects, planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and volcanic gas, gases to escape from a magma chamber below the surface. On Ear ...
compared to Mount St. Helens, the vastly more heavily populated areas surrounding Rainier, and the fact that Mount Rainier is almost twice the size of St. Helens. Lahars from Rainier pose the most risk to life and property, as many communities lie atop older lahar deposits. According to the
United States Geological Survey The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, ...
(USGS), about 150,000 people live on top of old lahar deposits of Rainier. Not only is there much ice atop the volcano, the volcano is also slowly being weakened by hydrothermal activity. According to Geoff Clayton, a geologist with a Washington State Geology firm, RH2 Engineering, a repeat of the 5000-year-old
Osceola Mudflow The Osceola Mudflow, also known as the Osceola Lahar, was a lahar in the U.S. state of Washington that descended from the summit and northeast slope of Mount Rainier during a period of eruptions about 5,600 years ago. It traveled down the west ...
would destroy Enumclaw,
Orting Orting is a city in Pierce County, Washington, United States. The population was 9,041 at the 2020 census. History The first recorded claims for land in Orting were made in 1854 by William Henry Whitesell, Thomas Headley, Daniel Lane, and D ...
,
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...
, Auburn, Puyallup, Sumner and all of Renton. Such a mudflow might also reach down the
Duwamish Duwamish may refer to: * Duwamish tribe, a Native American tribe in Washington state * Duwamish River, in Washington state * ''Duwamish'' (fireboat) See also * Elliott Bay Elliott Bay is a part of the Central Basin region of Puget Sound. It is ...
estuary and destroy parts of downtown Seattle, and cause
tsunami A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater exp ...
in Puget Sound and Lake Washington. Rainier is also capable of producing
pyroclastic flow A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of b ...
s and expelling lava. According to K. Scott, a scientist with the USGS:
A home built in any of the probabilistically defined inundation areas on the new maps is more likely to be damaged or destroyed by a lahar than by fire... For example, a home built in an area that would be inundated every 100 years, on the average, is 27 times more likely to be damaged or destroyed by a flow than by fire. People know the danger of fire, so they buy fire insurance and they have smoke alarms, but most people are not aware of the risks of lahars, and few have applicable flood insurance.
The volcanic risk is somewhat mitigated by lahar warning sirens and escape route signs in Pierce County. The more populous King County is also in the lahar area, but has no zoning restrictions due to volcanic hazard. More recently (since 2001) funding from the federal government for lahar protection in the area has dried up, leading local authorities in at-risk cities like Orting to fear a disaster similar to the
Armero tragedy The Armero tragedy ( es, Tragedia de Armero, links=no ) occurred following the eruption of the Nevado del Ruiz stratovolcano in Tolima, Colombia, on November 13, 1985. The volcano's eruption after 69 years of dormancy caught nearby towns unawa ...
.


Seismic background

Typically, up to five earthquakes are recorded monthly near the summit. Swarms of five to ten shallow earthquakes over two or three days take place from time to time, predominantly in the region of below the summit. These earthquakes are thought to be caused by the circulation of hot fluids beneath Mount Rainier. Presumably, hot springs and steam vents within Mount Rainier National Park are generated by such fluids. Seismic swarms (not initiated with a mainshock) are common features at volcanoes, and are rarely associated with eruptive activity. Rainier has had several such swarms; there were days-long swarms in 2002, 2004, and 2007, two of which (2002 and 2004) included M 3.2 earthquakes. A 2009 swarm produced the largest number of events of any swarm at Rainier since seismic monitoring began over two decades earlier. Further swarms were observed in 2011 and 2021.


Glaciers

Glacier A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as ...
s are among the most conspicuous and dynamic geologic features on Mount Rainier. They erode the volcanic cone and are important sources of streamflow for several rivers, including some that provide water for
hydroelectric power Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined an ...
and
irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been devel ...
. Together with perennial snow patches, the 29 named glacial features cover about of the mountain's surface in 2015 and have an estimated volume of about . Glaciers flow under the influence of gravity by the combined action of sliding over the rock on which they lie and by
deformation Deformation can refer to: * Deformation (engineering), changes in an object's shape or form due to the application of a force or forces. ** Deformation (physics), such changes considered and analyzed as displacements of continuum bodies. * Defor ...
, the gradual displacement between and within individual ice crystals. Maximum speeds occur near the surface and along the centerline of the glacier. During May 1970,
Nisqually Glacier The Nisqually Glacier is one of the larger glaciers on the southwestern face of Mount Rainier in the U.S. state of Washington. The glacier is one of the most easily viewed on the mountain, and is accessible from the Paradise visitor facilities in ...
was measured moving as fast as per day. Flow rates are generally greater in summer than in winter, probably due to the presence of large quantities of meltwater at the glacier base. The size of glaciers on Mount Rainier has fluctuated significantly in the past. For example, during the last ice age, from about 25,000 to about 15,000 years ago, glaciers covered most of the area now within the boundaries of Mount Rainier National Park and extended to the perimeter of the present Puget Sound Basin. Between the 14th century and 1850, many of the glaciers on Mount Rainier advanced to their farthest extent downvalley since the last ice age. Many advances of this sort occurred worldwide during this time period known to geologists as the Little Ice Age. During the Little Ice Age, the Nisqually Glacier advanced to a position downvalley from the site of the Glacier Bridge, Tahoma and South Tahoma Glaciers merged at the base of Glacier Island, and the terminus of
Emmons Glacier Emmons Glacier is on the northeast flank of Mount Rainier, in Washington. At , it has the largest surface area of any glacier in the contiguous United States. The glacier was named after the geologist Samuel Franklin Emmons after his involvement i ...
reached within of the White River Campground. Retreat of the Little Ice Age glaciers was slow until about 1920 when retreat became more rapid. Between the height of the Little Ice Age and 1950, Mount Rainier's glaciers lost about one-quarter of their length. Beginning in 1950 and continuing through the early 1980s, however, many of the major glaciers advanced in response to relatively cooler temperatures of the mid-century. The glaciers and snowfields of Mount Rainier also lost volume during this time, except for the Frying Pan and Emmons glaciers on the east flank and the small near-peak snowfields; the greatest volume loss was concentrated from ~1750 m (north) to ~2250 m (south) elevation. The largest single volume loss is from the Carbon Glacier, although it is to the north, due to its huge area at <2000 m elevation. The
Carbon Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon mak ...
,
Cowlitz Cowlitz may refer to: People * Cowlitz people, an indigenous people of the Pacific Northwest ** Cowlitz language, member of the Tsamosan branch of the Coast Salish family of Salishan languages * Cowlitz Indian Tribe, a federally recognized tribe of ...
, Emmons, and Nisqually Glaciers advanced during the late 1970s and early 1980s as a result of high snowfalls during the 1960s and 1970s. Since the early-1980s, however, many glaciers have been thinning and retreating and some advances have slowed. The glaciers on Mount Rainier can generate mudflows, through glacial outburst floods not associated with any eruption. The South Tahoma Glacier generated 30 floods in the 1980s and early 1990s, and again in August, 2015.


Human history

At the time of European contact, the river valleys and other areas near the mountain were inhabited by Native Americans who hunted and gathered animals and plants in Mount Rainier's forests and high elevation meadows. Modern descendants of these peoples are represented by members of modern tribes that surround the mountain; including the Nisqually Indian Tribe, the
Cowlitz Indian Tribe The Cowlitz Indian Tribe is a federally recognized tribe of Cowlitz people. They are a tribe of Southwestern Coast Salish and Sahaptan indigenous people of the Pacific Northwest located in Washington. Other Cowlitz people are enrolled in the C ...
, the Confederated Tribes and Bands of the
Yakama Nation The Yakama Indian Reservation (spelled Yakima until 1994) is a Native American reservation in Washington state of the federally recognized tribe known as the Confederated Tribes and Bands of the Yakama Nation. The tribe is made up of Klikitat ...
, the Puyallup Tribe of Indians, and the Muckleshoot Indian Tribe, among others in the area. The archaeological record of human use of the mountain dates to over 8,500 years before present (BP). Sites related to seasonal use of Mount Rainier and its landscapes are reflected in chipped stone tool remains and settings suggesting functionally varied uses including task-specific sites, rockshelters, travel stops, and long-term base camps. Their distribution on the mountain suggest primary use of subalpine meadows and low alpine habitats that provided relatively high resource abundance during the short summer season. Captain George Vancouver reached Puget Sound in early May 1792 and became the first European to see the mountain. In 1833, Dr. William Fraser Tolmie explored the area looking for medicinal plants. Hazard Stevens and P. B. Van Trump received a hero's welcome in the streets of Olympia after their successful summit climb in 1870. The first female ascent was made in 1890 by
Fay Fuller Evelyn Fay Fuller (October 10, 1869 – May 27, 1958) was an American journalist, mountaineer and schoolteacher. In 1890 she became the first woman to reach the summit of Mount Rainier. Biography Fay Fuller was born in 1869 in New Jersey to ...
, accompanied by Van Trump and three other teammates. Descending from the summit in 1883, James Longmire discovered a mineral spring; this ultimately led to his establishment of a spa and hotel, drawing other visitors to the area to seek the benefits of the spring. Later, the headquarters of the national park would be established at Longmire, until flooding caused them to be relocated to Ashford. The area also became the site of features like a museum, a post office, and a gas station, with additions like a library and a gift shop soon following; many of these buildings were ultimately nominated to the national historic register of historic places. Longmire remains the second most popular place in the park. In 1924, a publication from the park described the area:
"A feature at Longmire Springs of great interest to everyone is the group of mineral springs in the little flat to the west of National Park Inn. There are some forty distinct springs, a half dozen of which are easily reached from the road. An analysis of the waters show that they all contain about the smae icmineral salts but in slightly differing proportions. All the water is highly carbonated and would be classed as extremely "hard". Certain springs contain larger amounts of soda, iron and sulphur, giving them a distinct taste and color."
John Muir John Muir ( ; April 21, 1838December 24, 1914), also known as "John of the Mountains" and "Father of the National Parks", was an influential Scottish-American naturalist, author, environmental philosopher, botanist, zoologist, glaciologist ...
climbed Mount Rainier in 1888, and although he enjoyed the view, he conceded that it was best appreciated from below. Muir was one of many who advocated protecting the mountain. In 1893, the area was set aside as part of the
Pacific Forest Reserve The Pacific Forest Reserve was established by the General Land Office in Washington on February 20, 1893 with . On February 22, 1898 the forest was combined with other lands to create the Mount Rainier Forest Reserve, and the name was discontinued. ...
in order to protect its physical and economic resources, primarily timber and watersheds. Citing the need to also protect scenery and provide for public enjoyment, railroads and local businesses urged the creation of a national park in hopes of increased tourism. On March 2, 1899, President
William McKinley William McKinley (January 29, 1843September 14, 1901) was the 25th president of the United States, serving from 1897 until his assassination in 1901. As a politician he led a realignment that made his Republican Party largely dominant in ...
established Mount Rainier National Park as America's fifth national park. Congress dedicated the new park "for the benefit and enjoyment of the people" and "... for the preservation from injury or spoliation of all timber,
mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2 ...
deposits, natural curiosities, or wonders within said park, and their retention in their natural condition." On 24 June 1947,
Kenneth Arnold Kenneth Albert Arnold (March 29, 1915 – January 16, 1984) was an American aviator, businessman, and politician. He is best known for making what is generally considered the first widely reported modern unidentified flying object sighting in ...
reported seeing a formation of nine unidentified flying objects over Mount Rainier. His description led to the term "
flying saucers A flying saucer (also referred to as "a flying disc") is a descriptive term for a type of flying craft having a disc or saucer-shaped body, commonly used generically to refer to an anomalous flying object. The term was coined in 1947 but has g ...
". In 1998, the United States Geological Survey began putting together the
Mount Rainier Volcano Lahar Warning System The Mount Rainier Volcano Lahar Warning System consists of two separate components, operating in tandem: Acoustic Flow Monitors (AFM) and the All Hazard Alert Broadcast (AHAB) sirens. The AFM system was developed by the United States Geological Surv ...
to assist in the emergency evacuation of the
Puyallup River The Puyallup River ( ) is a river in the U.S. state of Washington. About long, it is formed by glaciers on the west side of Mount Rainier. It flows generally northwest, emptying into Commencement Bay, part of Puget Sound. The river and its tribu ...
valley in the event of a catastrophic debris flow. It is now run by the Pierce County Department of Emergency Management. Tacoma, at the mouth of the Puyallup, is only west of Rainier, and moderately sized towns such as Puyallup and Orting are only away, respectively. Mount Rainier appears on four distinct United States
postage stamp A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail), who then affix the stamp to the f ...
issues. In 1934, it was the 3-cent issue in a series of National Park stamps, and was also shown on a
souvenir sheet A souvenir sheet or miniature sheet is a postage stamp or a small group of postage stamps still attached to the Paper, sheet on which they were printed. They may be either regular issues that just happen to be printed in small groups (typical of m ...
issued for a philatelic convention. The following year, in 1935, both of these were reprinted by
Postmaster General A Postmaster General, in Anglosphere countries, is the chief executive officer of the postal service of that country, a ministerial office responsible for overseeing all other postmasters. The practice of having a government official responsib ...
James A. Farley as special issues given to officials and friends. Because of complaints by the public, "Farley's Follies" were reproduced in large numbers. The second stamp issue is easy to tell from the original because it is
imperforate For postage stamps, separation is the means by which individual stamps are made easily detachable from each other. Methods of separation include: # perforation: cutting rows and columns of small holes # rouletting: small horizontal and vert ...
. Both stamps and souvenir sheets are widely available. The Washington state quarter, which was released on April 11, 2007, features Mount Rainier and a
salmon Salmon () is the common name for several commercially important species of euryhaline ray-finned fish from the family Salmonidae, which are native to tributaries of the North Atlantic (genus ''Salmo'') and North Pacific (genus '' Oncorhy ...
.


Climbing

Mountain climbing on Mount Rainier is difficult, involving traversing the largest glaciers in the U.S. south of
Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...
. Most climbers require two to three days to reach the summit, with a success rate of approximately 50%, with weather and physical conditioning of the climbers being the most common reasons for failure. About 8,000 to 13,000 people attempt the climb each year, about 90% via routes from Camp Muir on the southeast flank, and most of the rest ascend
Emmons Glacier Emmons Glacier is on the northeast flank of Mount Rainier, in Washington. At , it has the largest surface area of any glacier in the contiguous United States. The glacier was named after the geologist Samuel Franklin Emmons after his involvement i ...
via Camp Schurman on the northeast. Climbing teams require experience in glacier travel, self-rescue, and wilderness travel. All climbers who plan to climb above the high camps, Camp Muir and Camp Schurman, are required to purchase a Mount Rainier Climbing Pass and register for their climb. Additionally, solo climbers must fill out a solo climbing request form and receive written permission from the Superintendent before attempting to climb.


Climbing routes

All climbing routes on Mount Rainier require climbers to possess some level of technical climbing skill. This includes ascending and descending the mountain with the use of technical climbing equipment such as crampons, ice axes, harnesses, and ropes. Difficulty and technical challenge of climbing Mount Rainier can vary widely between climbing routes. Routes are graded in NCCS Alpine Climbing format. The
normal route A normal route or normal way (french: voie normale; german: Normalweg) is the most frequently used route for ascending and descending a mountain peak. It is usually the simplest route. Overview In the Alps, routes are classed in the following way ...
to the summit of Mount Rainier is the Disappointment Cleaver Route, YDS grade II-III. As climbers on this route have access to the permanently established Camp Muir, it sees the significant majority of climbing traffic on the mountain. This route is also the most common commercially guided route. The term "cleaver" is used in the context of a rock ridge that separates two glaciers. The reason for naming this cleaver a "disappointment" is unrecorded, but it is thought to be due to climbers reaching it only to recognize their inability to reach the summit. An alternative route to the Disappointment Cleaver is the Ingraham Glacier Direct Route, grade II, and is often used when the Disappointment Cleaver route cannot be climbed due to poor route conditions. The Emmons Glacier Route, grade II, is an alternative to the Disappointment Cleaver route and poses a lower technical challenge to climbers. The climbers on the route can make use of Camp Schurman (9,500 ft), a glacial camp site. Camp Schurman is equipped with a solar toilet and a ranger hut. The Liberty Ridge Route, grade IV, is a considerably more challenging and objectively dangerous route than the normal route to the summit. It runs up the center of the North Face of Mount Rainier and crosses the very active Carbon Glacier. First climbed by Ome Daiber, Arnie Campbell and Jim Burrow in 1935, it is listed as one of the
Fifty Classic Climbs of North America ''Fifty Classic Climbs of North America'' is a climbing guidebook and history written by Steve Roper and Allen Steck. It is considered a classic piece of climbing literature, known to many climbers as simply "The Book", and has served as an inspi ...
by Steve Roper and
Allen Steck Allen Steck (born 1926) is an American mountaineer and rock climber. He is a native of Oakland, California. Mountaineering Steck started climbing with his brother George. In 1940 when Allen was 14, the two completed the first ascent of the nor ...
. This route only accounts for approximately 2% of climbers on the mountain, but approximately 25% of its deaths.


Dangers and accidents

About two mountaineering deaths each year occur because of rock and ice fall, avalanche, falls, and hypothermia. These incidents are often associated with exposure to very high altitude, fatigue, dehydration, and/or poor weather. 58 deaths on Mount Rainier have been reported from 1981 to 2010. Approximately 7 percent of mountaineering deaths and 6 percent of mountaineering accidents in the United States are attributed to Mount Rainier. The first known climbing death on Mount Rainier was Edgar McClure, a professor of chemistry at the University of Oregon, on July 27, 1897. During the descent in darkness, McClure stepped over the edge of the rock and slid to his death on a rocky outcrop. The spot is now known as McClure Rock.
Willi Unsoeld William Francis Unsoeld (October 5, 1926 – March 4, 1979) was an American mountaineer who was a member of the first American expedition to summit Mount Everest. The American Mount Everest Expedition was led by Norman Dyhrenfurth, and included ...
, who reached the summit of
Mount Everest Mount Everest (; Tibetic languages, Tibetan: ''Chomolungma'' ; ) is List of highest mountains on Earth, Earth's highest mountain above sea level, located in the Mahalangur Himal sub-range of the Himalayas. The China–Nepal border ru ...
in 1963, was killed, along with an
Evergreen State College The Evergreen State College is a public liberal arts college in Olympia, Washington. Founded in 1967, it offers a non-traditional undergraduate curriculum in which students have the option to design their own study towards a degree or follow a p ...
student, in an avalanche on Mount Rainier in 1979. He had climbed the mountain over 200 times. The worst mountaineering accident on Mount Rainier occurred in 1981, when ten clients and a guide died in an avalanche/ice fall on the
Ingraham Glacier Ingraham Glacier is on the south-eastern flank of Mount Rainier, in the U.S. state of Washington. The glacier is named for the Mount Rainier enthusiast Edward Sturgis Ingraham. From the summit ice cap, Ingraham Glacier flows east between Gibraltar ...
. This was the largest number of fatalities on Mount Rainier in a single incident since 32 people were killed in a 1946 plane crash on the South Tahoma Glacier. In one of the worst disasters on the mountain in over thirty years, six climbers—two guides, and four clients—were killed on May 31, 2014, after the climbers fell 3,300 feet (1,000 m) while attempting the summit via the Liberty Ridge climbing route. Low-flying search helicopters pinged the signals from the avalanche beacons worn by the climbers, and officials concluded that there was no possible chance of survival. Searchers found tents and clothes along with rock and ice strewn across a debris field on the Carbon Glacier at , possible evidence for a slide or avalanche in the vicinity where the team went missing, though the exact cause of the accident is unknown. The bodies of three of the client climbers were spotted on August 7, 2014, during a training flight and subsequently recovered on August 19, 2014. The bodies of the fourth client climber and two guides have not been located.


Outdoor recreation

In addition to climbing,
hiking Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Histor ...
,
backcountry skiing Backcountry skiing ( US), also called off-piste (Europe), alpine touring, or out-of-area, is skiing in the backcountry on unmarked or unpatrolled areas either inside or outside a ski resort's boundaries. This contrasts with alpine skiing, which i ...
,
photography Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is employe ...
, and
camping Camping is an outdoor activity involving overnight stays away from home, either without shelter or using basic shelter such as a tent, or a recreational vehicle. Typically, participants leave developed areas to spend time outdoors in more na ...
are popular activities in the park.
Hiking trail A trail, also known as a path or track, is an unpaved lane or small road usually passing through a natural area. In the United Kingdom and the Republic of Ireland, a path or footpath is the preferred term for a pedestrian or hiking trail. The ...
s, including the
Wonderland Trail The Wonderland Trail is an approximately hiking trail that circumnavigates Mount Rainier in Mount Rainier National Park, Washington, United States. The trail goes over many ridges of Mount Rainier for a cumulative of elevation gain. The trail ...
—a circumnavigation of the peak, provide access to the backcountry. Popular for
winter sports Winter sports or winter activities are competitive sports or non-competitive recreational activities which are played on snow or ice. Most are variations of skiing, ice skating and sledding. Traditionally, such games were only played in cold are ...
include
snowshoe Snowshoes are specialized outdoor gear for walking over snow. Their large footprint spreads the user's weight out and allows them to travel largely on top of rather than through snow. Adjustable bindings attach them to appropriate winter footwe ...
ing and cross-country skiing.


Climate

The summit of Mount Rainier has an
ice cap climate An ice cap climate is a polar climate where no mean monthly temperature exceeds . The climate covers areas in or near the high latitudes (65° latitude) to polar regions (70–90° north and south latitude), such as Antarctica, some of the northe ...
(
Köppen climate classification The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notabl ...
: EF)


Ecology

Mount Rainier's protected status as a national park protects its
primeval Primeval may refer to: * Primeval forest, an area of forest that has attained great age * Primeval number, a positive integer satisfying certain conditions * Primeval history, name given by biblical scholars to the first eleven chapters of the Bo ...
Cascade ecosystem, providing a stable
habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
for many
species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
in the region, including
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
flora Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' ...
and
fauna Fauna is all of the animal life present in a particular region or time. The corresponding term for plants is ''flora'', and for fungi, it is ''funga''. Flora, fauna, funga and other forms of life are collectively referred to as ''Biota (ecology ...
that are unique to the area, such as the Cascade red fox and Mount Rainier lousewort. The ecosystem on the mountain is very diverse, owing to the climate found at different elevations. Scientists track the distinct species found in the
forest A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...
zone, the
subalpine Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...
zone, and the
alpine Alpine may refer to any mountainous region. It may also refer to: Places Europe * Alps, a European mountain range ** Alpine states, which overlap with the European range Australia * Alpine, New South Wales, a Northern Village * Alpine National Pa ...
zone. They have discovered more than one thousand species of
plants Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all current definitions of Plantae exclude ...
and
fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...
. The mountain is also home to 65 species of
mammals Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur o ...
, 5 reptile, 182
bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig ...
, 14 amphibians, and 14 of native
fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of ...
, in addition to an innumerable amount of
invertebrates Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordat ...
.


Flora

Mount Rainier has regularly been described as one of the best places in the world to view wildflowers. In the subalpine region of the mountain, the snow often stays on the ground until summer begins, limiting plants to a much shorter growing season. This produces dramatic blooms in areas like
Paradise In religion, paradise is a place of exceptional happiness and delight. Paradisiacal notions are often laden with pastoral imagery, and may be cosmogonical or eschatological or both, often compared to the miseries of human civilization: in parad ...
. In 1924, the flowers were described by naturalist Floyd W. Schmoe:
"Mount Rainier National Park is perhaps better known the world over for these wonderful flowers than for any one feature. The mountains, the glaciers, the cascading streams and the forests may be equalled if one looks far away enough, but no park has been so favored in the way of wild flowers."
Forests on the mountain span from as young as 100 years old to sections of
old growth forest An old-growth forestalso termed primary forest, virgin forest, late seral forest, primeval forest, or first-growth forestis a forest that has attained great age without significant disturbance, and thereby exhibits unique ecological feature ...
that are calculated to be 1000 years or more in age. The lower elevation consists mainly of
western red-cedar ''Thuja plicata'' is an evergreen coniferous tree in the cypress family Cupressaceae, native to western North America. Its common name is western redcedar (western red cedar in the UK), and it is also called Pacific redcedar, giant arborvitae, ...
, Douglas fir, and
western hemlock ''Tsuga heterophylla'', the western hemlock or western hemlock-spruce, is a species of hemlock native to the west coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in northern Sonoma ...
.
Pacific silver fir ''Abies amabilis'', commonly known as the Pacific silver fir, is a fir native to the Pacific Northwest of North America, occurring in the Pacific Coast Ranges and the Cascade Range. It is also commonly referred to as the white fir, red fir, l ...
,
western white pine Western white pine (''Pinus monticola''), also called silver pine and California mountain pine, is a species of pine in the family Pinaceae. It occurs in mountain ranges of northwestern North America. It is the state tree of Idaho. Description ...
, Alaska yellow cedar, and
noble fir ''Abies procera'', the noble fir, also called red fir and Christmas tree, is a species of fir native to the Cascade Range and Pacific Coast Ranges of the northwestern Pacific Coast of the United States. It occurs at altitudes of . Description ' ...
are found further up the mountain. In the alpine level, Alaskan yellow cedar,
subalpine fir ''Abies lasiocarpa'', the subalpine fir or Rocky Mountain fir, is a western North American fir tree. Description ''Abies lasiocarpa'' is a medium-sized evergreen conifer with a very narrow conic crown, growing to tall, exceptionally , with a t ...
, and
mountain hemlock ''Tsuga mertensiana'', known as mountain hemlock, is a species of hemlock native to the west coast of North America, found between Southcentral Alaska and south-central California. Description ''Tsuga mertensiana'' is a large evergreen conifer ...
grow.


Fauna

The mountain supports a wide variety of animal life, including several species that are protected on the state or federal level, like the
Northern Spotted Owl The northern spotted owl (''Strix occidentalis caurina'') is one of three spotted owl subspecies. A western North American bird in the family Strigidae, genus '' Strix'', it is a medium-sized dark brown owl native to the Pacific Northwest. An ...
. Efforts are also being made to reintroduce native species that had locally been hunted to extinction, like the Pacific fisher. There are sixty-five types of mammals living on the mountain, including
cougars The cougar (''Puma concolor'') is a large cat native to the Americas. Its range spans from the Canadian Yukon to the southern Andes in South America and is the most widespread of any large wild terrestrial mammal in the Western Hemisphere. ...
,
mountain goats The mountain goat (''Oreamnos americanus''), also known as the Rocky Mountain goat, is a hoofed mammal endemic to mountainous areas of western North America. A subalpine to alpine species, it is a sure-footed climber commonly seen on cliffs and ...
, marmots, and elk. Common reptiles and amphibians include
garter snakes Garter snake is a common name for generally harmless, small to medium-sized snakes belonging to the genus ''Thamnophis'' in the family Colubridae. Native to North and Central America, species in the genus ''Thamnophis'' can be found from the sub ...
,
frogs A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-frog" '' Triadobatrachus'' is ...
, and
salamanders Salamanders are a group of amphibians typically characterized by their lizard-like appearance, with slender bodies, blunt snouts, short limbs projecting at right angles to the body, and the presence of a tail in both larvae and adults. All ten ...
. There are many types of birds found throughout the different elevations on the mountain, but while some live there all year, many are migratory. Salmon and
trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', '' Salmo'' and '' Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salm ...
species use the rivers formed by the glaciers, and though the lakes stopped being stocked in 1972, thirty lakes still have reproducing populations.


See also

*
Mount Rainier National Park Mount Rainier National Park is an American national park located in southeast Pierce County and northeast Lewis County in Washington state. The park was established on March 2, 1899, as the fourth national park in the United States, preservi ...
* Mount Rainier Wilderness *
Mount Rainier Forest Reserve Mount is often used as part of the name of specific mountains, e.g. Mount Everest. Mount or Mounts may also refer to: Places * Mount, Cornwall, a village in Warleggan parish, England * Mount, Perranzabuloe, a hamlet in Perranzabuloe parish, C ...
* Bibliography of Mount Rainier National Park


References


Notes


External links


Mount Rainier National Park
(also used as a reference) *
Mt. Rainier Eruption Task Force
(pdf)



* * * : contains images and videos of the summit caves


University of Washington libraries and digital collections


Lawrence Denny Lindsley Photographs
Landscape and
nature photography Nature photography is a wide range of photography taken outdoors and devoted to displaying natural elements such as landscapes, wildlife, plants, and close-ups of natural scenes and textures. Nature photography tends to put a stronger emphasis o ...
of Lawrence Denny Lindsley, including photographs of scenes around Mount Rainier.
The Mountaineers Collection
Photographic albums and text documenting the Mountaineers official annual outings undertaken by club members from 1907–1951, includes 3 Mt. Rainier albums (ca. 1912, 1919, 1924).
Henry M. Sarvant Photographs
photographs by Henry Mason Sarvant depicting his climbing expeditions to Mt. Rainier and scenes of the vicinity from 1892–1912.
Alvin H. Waite Photographs
Photographs of Mt. Rainier by Alvin H. Waite, during the late 19th and early 20th centuries. {{DEFAULTSORT:Rainier, Mount Stratovolcanoes of the United States Volcanoes of Washington (state) Mount Rainier Decade Volcanoes Subduction volcanoes Cascade Volcanoes Active volcanoes VEI-4 volcanoes Highest points of United States national parks Mount Rainier Mountains of Pierce County, Washington Pleistocene stratovolcanoes Highest points of U.S. states Mount Rainier