Lakes / Washington / Sanpoil River Arm
Sanpoil River Arm, Washington
2,217 acres
Surface Area
1,283 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Washington
47.99 degrees N, 118.68 degrees W - Ferry 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.
Facts and Figures
Waterbody ID141689016
CountyFerry
Lake TypeLake
Coordinates47.9942, -118.6814
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: USGS NHD via WA Dept of Ecology lake data (ID 141689016). Verified October 30, 2026.