Lakes / California / Contra Costa County / Clifton Court Forebay
Clifton Court Forebay, California
2,215 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
37.84 degrees N, 121.58 degrees W - Contra Costa 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 Clifton Court Forebay Stacks Up
- Larger than 94% of the 1,147 lakes counted in California.
- The largest lake in Contra Costa County among those counted.
- About 46 miles from San Francisco, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bethany Reservoir | Alameda | 4.6 mi | 164 acres |
| Willow Lake | Contra Costa | 5.0 mi | 89 acres |
| Marsh Creek Reservoir | Contra Costa | 8.9 mi | 51 acres |
| Antioch Municipal Reservoir | Contra Costa | 16 mi | 57 acres |
| Oakwood Lake | San Joaquin | 16 mi | 108 acres |
| Lake Lincoln | San Joaquin | 16 mi | 54 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Clifton Court Forebay
How Big Is Clifton Court Forebay?
Clifton Court Forebay covers 2,215 acres in Contra Costa County, California.
What Is the Largest Lake in Contra Costa County?
Clifton Court Forebay is the largest lake in Contra Costa County, at 2,215 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 153039018). Verified October 30, 2026.