Lakes / California / San Mateo County
Lakes in San Mateo County, California
7 lakes counted in San Mateo County - the largest is Upper Crystal Springs Reservoir at 595 acres.
7
Lakes Counted
595 acres
Largest - Upper Crystal Springs Reservoir
San Mateo County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Upper Crystal Springs Reservoir | San Mateo | 595 acres | - |
| 2 | Lower Crystal Springs Reservoir | San Mateo | 586 acres | - |
| 3 | San Andreas Lake | San Mateo | 486 acres | - |
| 4 | Central Lake | San Mateo | 239 acres | - |
| 5 | Pilarcitos Lake | San Mateo | 89 acres | - |
| 6 | Lake Lucerne | San Mateo | 33 acres | - |
| 7 | Arroyo de los Frijoles | San Mateo | 31 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.