Lakes / Washington / Sullivan Lake
Sullivan Lake, Pend Oreille County, Washington
1,296 acres
Surface Area
About 330 ft
Max Depth (Approximate)
2,590 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Washington
48.81 degrees N, 117.29 degrees W - Pend Oreille 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 - Sullivan Lake
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.
How Sullivan Lake Stacks Up
- The largest lake in Pend Oreille County among those counted.
- About 80 miles from Spokane, as the crow flies.
- 9 fish species on the WDFW list for this lake.
Fish Species
Brown troutBurbotKokaneeMountain whitefishPygmy WhitefishRainbow troutRedside shinerTenchWestslope cutthroat trout
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID141466856
CountyPend Oreille
Lake TypeLake
Coordinates48.8148, -117.2900
Largest Lakes in Washington
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Franklin D Roosevelt Lake | Ferry | 71,323 acres | - |
| 2 | Lake Umatilla | Klickitat | 50,042 acres | - |
| 3 | Lake Chelan | Chelan | 32,677 acres | About 1,500 ft |
| 4 | Banks Lake | Grant | 26,879 acres | - |
| 5 | Lake Wallula | Benton | 26,343 acres | - |
Sources: Washington DFW; USGS NHD via WA Dept of Ecology lake data (ID 141466856); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.