Soap Lake

For the city, see Soap Lake, Washington.
Soap Lake
View from the south shore of Soap Lake
Location of Soap Lake in Washington, USA.
Location of Soap Lake in Washington, USA.
Soap Lake
Location of Soap Lake in Washington, USA.
Location of Soap Lake in Washington, USA.
Soap Lake
LocationGrant County, Washington,
United States
Coordinates47°24′18″N 119°29′51″W / 47.405°N 119.4975°W / 47.405; -119.4975
Typemeromictic
Basin countriesUnited States
Surface area2 sq mi (5.2 km2)
Foam on the shore of Soap Lake
Pacific Apartments, nationally advertised as the social center and health resort of the Columbia Basin (1928)

Soap Lake is a meromictic soda lake in the town of Soap Lake, Washington formed by the Missoula Floods at the foot of the Grand Coulee. The lake gets its name from the naturally occurring foam that gives its water a soapy appearance, and because the lake's mineral-rich waters have a slick, soapy feel. The lake is approximately 2 square miles (5.2 km2) in area and 70 feet (21 m) deep.