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Lakes / Washington / Alkali Lake

Alkali Lake, Grant County, Washington

299 acres
Surface Area
About 12 ft
Max Depth (Approximate)
1,084 ft
Surface Elevation

Where It Sits, and How Deep It Goes

Locator - Washington

OlympiaSeattleAlkali LakeGrant Co.

47.53 degrees N, 119.49 degrees W - Grant County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Washington DFW coordinates, not by eye. Schematic - not a survey map.

Depth Profile - Alkali Lake

0 ft - SurfaceMax Depth (Approx.) - About 12 ft

Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map. Max depth is approximate, from Washington Dept. of Ecology bathymetry.

Facts and Figures

Waterbody ID147546811
CountyGrant
Lake TypeLake
Coordinates47.5277, -119.4878

Largest Lakes in Washington

#LakeCountySurface AreaMax Depth
1Franklin D Roosevelt LakeFerry71,323 acres-
2Lake UmatillaKlickitat50,042 acres-
3Lake ChelanChelan32,677 acresAbout 1,500 ft
4Banks LakeGrant26,879 acres-
5Lake WallulaBenton26,343 acres-
Sources: Washington DFW; USGS NHD via WA Dept of Ecology lake data (ID 147546811); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.