Adelaide Peak is a 7,300-foot-elevation (2,225 meter) mountain

summit A summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. The topographic terms acme, apex, peak (mountain peak), and zenith are synonymous. The term (mountain top) is generally used only for a m ...

located in the

Olympic Mountains The Olympic Mountains are a mountain range on the Olympic Peninsula of the Pacific Northwest of the United States. The mountains, part of the Pacific Coast Ranges, are not especially high – Mount Olympus is the highest at ; however, the east ...

, in

Jefferson County Jefferson County may refer to one of several counties or parishes in the United States, all of which are named directly or indirectly after Thomas Jefferson: *Jefferson County, Alabama *Jefferson County, Arkansas *Jefferson County, Colorado **Jeffe ...

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 ...

state. It is situated within

Olympic National Park Olympic National Park is a United States national park located in the State of Washington, on the Olympic Peninsula. The park has four regions: the Pacific coastline, alpine areas, the west-side temperate rainforest, and the forests of the drier ...

and the

Daniel J. Evans Wilderness Daniel is a masculine given name and a surname of Hebrew origin. It means "God is my judge"Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 68. (cf. Gabriel—"God is my strength ...

. It is part of

The Needles The Needles is a row of three stacks of chalk that rise about out of the sea off the western extremity of the Isle of Wight in the English Channel, United Kingdom, close to Alum Bay and Scratchell's Bay, and part of Totland, the wester ...

range, which is a subset of the Olympic range. The nearest higher peak is Mount Clark, to the south, and

Mount Walkinshaw Mount Walkinshaw is a 7,378-foot (2,249 m) mountain summit located in the Olympic Mountains, in Jefferson County of Washington state. It is situated within Olympic National Park, and is the northernmost peak in The Needles range, which is a ...

rises to the north-northwest. The peak is in the

rain shadow A rain shadow is an area of significantly reduced rainfall behind a mountainous region, on the side facing away from prevailing winds, known as its leeward side. Evaporated moisture from water bodies (such as oceans and large lakes) is carri ...

of the Olympic Range, resulting in less precipitation than Mount Olympus and the western Olympics receive. Precipitation

runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock market ...

from the mountain drains east into Royal Creek, and west into

Gray Wolf River The Gray Wolf River is a river of the Olympic Peninsula in Washington. It is a tributary of the Dungeness River. It heads near Gray Wolf Pass and drains the west slope of The Needles. See also * List of rivers of Washington This is a list of riv ...

, which are both within the

drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

of the

Dungeness River The Dungeness River is a long river located in the Olympic Peninsula in the U.S. state of Washington. It rises near Mount Constance in the Olympic Mountains within the Olympic National Park, flows through the Buckhorn Wilderness, passes by the ...

Topographic relief Terrain or relief (also topographical relief) involves the vertical and horizontal dimensions of land surface. The term bathymetry is used to describe underwater relief, while hypsometry studies terrain relative to sea level. The Latin w ...

is significant as the east aspect rises 2,600 feet (793 m) above Royal Creek in less than one mile.

History

The

first ascent In mountaineering, a first ascent (abbreviated to FA in guide books) is the first successful, documented attainment of the top of a mountain or the first to follow a particular climbing route. First mountain ascents are notable because they e ...

of the peak was made in 1944 by Adel and William Degenhardt.Olympic Mountain Rescue, ''Olympic Mountains: A Climbing Guide'', Fourth Edition, 2006, The Mountaineers Books, page 155. The mountain's name commemorates Adelaide Degenhardt, who made that first ascent. The mountain's name was submitted for consideration in 1958 by Kent Heathershaw and Robert McKee to recognize the Degenhardts for pioneering the Needles area as a climbing area. The husband-wife climbing duo also made the first ascent of nearby

Sundial A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a fl ...

the same year. William Degenhardt is the namesake of

Mount Degenhardt Mount Degenhardt, elevation , is a mountain peak in the Picket Range in the U.S. state of Washington and within North Cascades National Park. Located in the northern section of the park, Mount Degenhardt is southeast of Mount Terror, west of ...

located in

North Cascades National Park North Cascades National Park is an American national park in the state of Washington. At more than , it is the largest of the three National Park Service units that comprise the North Cascades National Park Complex. North Cascades National Pa ...

. This landform's toponym has not been officially adopted by the

U.S. Board on Geographic Names The United States Board on Geographic Names (BGN) is a federal body operating under the United States Secretary of the Interior. The purpose of the board is to establish and maintain uniform usage of geographic names throughout the federal govern ...

, so the mountain is not labeled as Adelaide Peak on USGS maps.

Climate

Adelaide Peak is located in the

marine west coast An oceanic climate, also known as a marine climate, is the humid temperate climate sub-type in Köppen classification ''Cfb'', typical of west coasts in higher middle latitudes of continents, generally featuring cool summers and mild winters ...

climate zone of western North America.

Weather front A weather front is a boundary separating air masses for which several characteristics differ, such as air density, wind, temperature, and humidity. Disturbed and unstable weather due to these differences often arises along the boundary. For ...

s originating in the Pacific Ocean travel northeast toward the Olympic Mountains. As fronts approach, they are forced upward by the peaks (

orographic lift Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and cr ...

), causing them to drop their moisture in the form of rain or snow. As a result, the Olympics experience high precipitation, especially during the winter months in the form of snowfall. Because of maritime influence, snow tends to be wet and heavy, resulting in high

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 ear ...

danger. During winter months weather is usually cloudy, but due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer. The months of July through September offer the most favorable weather for climbing Adelaide Peak.

Geology

The Olympic Mountains are composed of obducted

clastic Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus,Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-3 chunks, and smaller grains of rock broken off other rock ...

wedge material and oceanic crust, primarily

Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...

turbidite A turbidite is the geologic deposit of a turbidity current, which is a type of amalgamation of fluidal and sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean. Sequencing Turbidites w ...

, and

basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of a ...

ic oceanic crust. The mountains were sculpted during the

Pleistocene The Pleistocene ( , often referred to as the '' Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed ...

era by erosion and glaciers advancing and retreating multiple times. Adelaide mtn

References

External links

* {{Geographic Location 2 , Center = Adelaide Peak , North =

, Northeast =

Gray Wolf Ridge Gray Wolf Ridge is a spur of the northeastern Olympic Mountains in Washington's Olympic Peninsula. Arcing northeast from the Mount Deception - Needles - Mount Clark - Mount Walkinshaw massif, Gray Wolf Ridge is covered by alpine and subalpi ...

, East =

Petunia Peak Petunia Peak is a mountain summit located in Jefferson County of Washington state. Description Petunia Peak is set in the northeastern Olympic Mountains, and is situated on the boundary shared by Olympic National Park with the Buckhorn Wild ...

, Southeast =

, South = Mount Clark , Southwest = Mount Johnson , West = Gray Wolf River , Northwest =

Mountains of Washington (state) Olympic Mountains Mountains of Jefferson County, Washington Landforms of Olympic National Park North American 2000 m summits