Lakes / California / Contra Costa County / Marsh Creek Reservoir
Marsh Creek Reservoir, California
51 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
37.89 degrees N, 121.73 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 Marsh Creek Reservoir Stacks Up
- Larger than 33% of the 1,147 lakes counted in California.
- About 39 miles from San Francisco, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Willow Lake | Contra Costa | 7.2 mi | 89 acres |
| Antioch Municipal Reservoir | Contra Costa | 7.5 mi | 57 acres |
| Contra Loma Reservoir | Contra Costa | 8.1 mi | 69 acres |
| Clifton Court Forebay | Contra Costa | 8.9 mi | 2,215 acres |
| Bethany Reservoir | Alameda | 9.9 mi | 164 acres |
| Sherman Lake | Contra Costa | 11 mi | 1,841 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Marsh Creek Reservoir
How Big Is Marsh Creek Reservoir?
Marsh Creek Reservoir covers 51 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 153038803). Verified October 30, 2026.