Lakes / California / San Bernardino County / Gene Wash Reservoir
Gene Wash Reservoir, California
178 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
34.30 degrees N, 114.17 degrees W - San Bernardino County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Gene Wash Reservoir Stacks Up
- Larger than 67% of the 1,147 lakes counted in California.
- About 204 miles from San Diego, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Copper Basin Reservoir | San Bernardino | 3.4 mi | 406 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Gene Wash Reservoir
How Big Is Gene Wash Reservoir?
Gene Wash Reservoir covers 178 acres in San Bernardino County, California.
What Is the Largest Lake in San Bernardino County?
Big Bear Lake is the largest lake in San Bernardino County, at 2,695 acres.
Largest Lakes in California
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Salton Sea | Imperial | 233,096 acres | - |
| 2 | Lake Tahoe | Placer | 122,975 acres | - |
| 3 | Goose Lake | Modoc | 93,048 acres | - |
| 4 | Honey Lake | Lassen | 59,917 acres | - |
| 5 | Mono Lake | Mono | 45,124 acres | - |
All 1,147 California lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 124650371). Verified October 30, 2026.