Lakes / Washington / Big Twin Lake
Big Twin Lake, Okanogan County, Washington
65 acres
Surface Area
About 65 ft
Max Depth (Approximate)
1,791 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Washington
48.45 degrees N, 120.19 degrees W - Okanogan 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 - Big Twin 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 Big Twin Lake Stacks Up
- About 115 miles from Seattle, as the crow flies.
- 2 fish species on the WDFW list for this lake.
Fish Species
Cutthroat troutRainbow trout
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID144386019
CountyOkanogan
Lake TypeLake
Coordinates48.4463, -120.1948
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 144386019); Washington Dept. of Ecology bathymetry (approximate max depth). Verified October 30, 2026.