Summer Lake is a large, shallow, alkali lake in Lake County,

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

located south of the small, unincorporated community of Summer Lake, Oregon. At high water it is about long and wide, and supports a wide variety of birds and other wildlife in its marshes. The lake was named by explorer

John C. Frémont Major general (United States), Major-General John Charles Frémont (January 21, 1813July 13, 1890) was a United States Army officer, explorer, and politician. He was a United States senator from California and was the first History of the Repub ...

on his expedition into

Central Oregon Central Oregon is a geographic region in the U.S. state of Oregon and is traditionally considered to be made up of Deschutes, Jefferson, and Crook counties. Other definitions include larger areas, often encompassing areas to the north towards t ...

in 1843.

Ancient Lake Chewaucan

The arid lands around Summer Lake were once lush. During the

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

Epoch, vast areas of this region of south central Oregon were covered by

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

s and

wetlands A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water, either permanently, for years or decades, or only seasonally. Flooding results in oxygen-poor ( anoxic) processes taking place, especially ...

. As the last ice age was ending, rain and runoff from melting snow filled the lowlands throughout this region of the

Great Basin The Great Basin () is the largest area of contiguous endorheic watersheds, those with no outlets to the ocean, in North America. It spans nearly all of Nevada, much of Utah, and portions of California, Idaho, Oregon, Wyoming, and Baja Californi ...

, creating an immense, freshwater lake called Lake Chewaucan. The lake covered at depths of up to ."Ancient Lakes", Oregon Historical Marker, Summer Lake, Oregon. Lake Chewaucan covered the Summer Lake basin and drainage system much of the late Pleistocene. The last high water period is thought to have occurred about 13,000 years ago. There is archaeological evidence of human use of Lake Chewaucan during this time. The oldest known human remains in the Western Hemisphere come from the

Paisley Caves The Paisley Caves or the Paisley Five Mile Point Caves complex is a system of eight caves in an arid, desolate region of south-central Oregon, United States north of the present-day city of Paisley, Oregon. The caves are located in the Summer L ...

, wave-cut caves currently 10 miles southwest from Summer Lake. Lake Chewaucan began to dry up at the close of the Pleistocene. As it shrank, salts and alkali were concentrated in its remaining waters. The exposed lake bottom sediments were blown by the prevailing westerly winds to form the sand dunes that still lie on the east side of Summer Lake. Today, Summer Lake and Abert Lake are separated by and are the only remnants of Lake Chewaucan. At high water, Summer Lake is about long and wide; however, water levels fluctuate dramatically, and sometimes the lake is almost dry in summer. The main source of fresh water is the small spring-fed Ana River, which is used for irrigation.Witty, Jim
"Ana River"
''The Bulletin'', Bend Oregon, 5 January 2007.

Fremont expedition

Summer Lake was spotted and named by Captain John C. Frémont during his 1843 mapping expedition through central Oregon. Fremont and his Army topographical team were mapping the

Oregon Territory The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the United States, Union as the Oreg ...

from The Dalles on

Columbia River The Columbia River (Upper Chinook language, Upper Chinook: ' or '; Sahaptin language, Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river headwater ...

Sutter's Fort Sutter's Fort was a 19th-century agricultural and trade colony in the Mexican ''Alta California'' province. Established in 1839, the site of the fort was originally part of a utopian colonial project called New Helvetia (''New Switzerland'') ...

Sacramento, California Sacramento ( or ; ; ) is the List of capitals in the United States, capital city of the U.S. state of California and the county seat, seat of Sacramento County, California, Sacramento County. Located at the confluence of the Sacramento Rive ...

. On 16 December 1843, the expedition struggled down a steep cliff from a snow-covered plateau to reach a large lake in the valley below. Frémont named the snow-covered rim "Winter Ridge" and the temperate waters "Summer Lake." Frémont described the discovery and naming of Summer Lake as follows:

Wildlife refuge

The Summer Lake Basin supports more than 250 species of birds including

bald eagles The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a Species complex, species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies ...

Canada geese The Canada goose (''Branta canadensis''), sometimes called Canadian goose, is a large species of goose with a black head and neck, white cheeks, white under its chin, and a brown body. It is native to the arctic and temperate regions of North ...

, white faced ibis, yellow-headed blackbirds, goshawks, hermit thrushes, red-tail hawks, great blue herons, and numerous species of ducks. This makes Summer Lake a favorite

bird watching Birdwatching, or birding, is the observing of birds, either as a recreational activity or as a form of citizen science. A birdwatcher may observe by using their naked eye, by using a visual enhancement device such as binoculars or a telescop ...

and

hunting Hunting is the Human activity, human practice of seeking, pursuing, capturing, and killing wildlife or feral animals. The most common reasons for humans to hunt are to obtain the animal's body for meat and useful animal products (fur/hide (sk ...

area. The

Oregon Department of Fish and Wildlife The Oregon Department of Fish and Wildlife (ODFW) is a state government, government agency of the U.S. state of Oregon responsible for programs protecting Oregon fish and wildlife resources and their habitats. The agency operates hatcheries, i ...

maintains the Summer Lake Wildlife Area on the north side of the lake. The refuge consists of a large

wetland A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water, either permanently, for years or decades, or only seasonally. Flooding results in oxygen-poor ( anoxic) processes taking place, especially ...

marsh fed by the Ana River with associated high desert uplands with an tour route open to the public most of the year. The refuge headquarters is located adjacent to Oregon Route 31 in the town of Summer Lake, directly across from the Summer Lake Lodge.

Dust storm

Plumes of Summer Lake dust, lifted by winds of up to , are thought to be responsible for "dirty rain" that fell on February 6, 2015, across parts of three U.S. states: Oregon,

Washington Washington most commonly refers to: * George Washington (1732–1799), the first president of the United States * Washington (state), a state in the Pacific Northwest of the United States * Washington, D.C., the capital of the United States ** A ...

, and

Idaho Idaho ( ) is a landlocked U.S. state, state in the Pacific Northwest and Mountain states, Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington (state), ...

. Scientists at

Washington State University Washington State University (WSU, or colloquially Wazzu) is a Public university, public Land-grant university, land-grant research university in Pullman, Washington, United States. Founded in 1890, WSU is also one of the oldest Land-grant uni ...

concluded that an unusual combination of weather systems carried the dust up to north and northeast, where it mixed with rain, which turned "milky". Chalky residue coated cars and windows in Hermiston,

Spokane Spokane ( ) is the most populous city in eastern Washington and the county seat of Spokane County, Washington, United States. It lies along the Spokane River, adjacent to the Selkirk Mountains, and west of the Rocky Mountain foothills, south ...

, and at least 13 other cities.

References

External links