Lakes / Washington / Ross Lake
Ross Lake, Whatcom County, Washington
11,569 acres
Surface Area
1,553 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Washington
48.84 degrees N, 121.05 degrees W - Whatcom 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.
How Ross Lake Stacks Up
- Ranks #10 for surface area among the Washington lakes counted so far - 11,569 acres.
- The largest lake in Whatcom County among those counted.
- About 104 miles from Seattle, as the crow flies.
- 1 fish species on the WDFW list for this lake.
Fish Species
Rainbow trout
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID130065132
CountyWhatcom
Lake TypeLake
Coordinates48.8376, -121.0454
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 130065132). Verified October 30, 2026.