Alkali Lake (Oregon)

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Alkali Lake
Location Lake County, Oregon
Coordinates 42°58′38″N 120°01′41″W / 42.97722°N 120.02806°W / 42.97722; -120.02806Coordinates: 42°58′38″N 120°01′41″W / 42.97722°N 120.02806°W / 42.97722; -120.02806
Lake type seasonal, alkali
Basin countries United States
Surface elevation 4,332 ft (1,320 m)

Alkali Lake is a geographic sink in Lake County, Oregon, United States. It is in the Alkali Subbasin of the Summer Lake Basin watershed in southeastern Oregon,[1] located 26 miles east of Christmas Valley, Oregon, northeast of Lake Abert,[2] to the immediate west of Abert Rim and Highway 395.

Alkali Lake is thought to have reached a prehistoric maximum depth of 270.7 feet (82.5 meters) and covered about 1448.4 square miles (2,331 square kilometers). Since then, its water level has varied, with a drying trend.[1] Notable features include dissolved alkaline salts averaging 10% of total brine weight[2] in its seasonal waters and a nearby chemical disaster, Alkali Lake Chemical Waste Dump.


Plants known to occur in the dunes immediately north of the lake include:[3]


This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Alkali Lake has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.[4]

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