Lakes / California / San Diego County / San Dieguito Reservoir
San Dieguito Reservoir, California
60 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
33.04 degrees N, 117.19 degrees W - San Diego 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 San Dieguito Reservoir Stacks Up
- Larger than 38% of the 1,147 lakes counted in California.
- About 22 miles from San Diego, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Olivenhain Reservoir | San Diego | 4.2 mi | 180 acres |
| Lake Hodges | San Diego | 5.2 mi | 618 acres |
| Lake San Marcos | San Diego | 5.6 mi | 56 acres |
| Lake Miramar | San Diego | 10 mi | 145 acres |
| Lake Poway | San Diego | 11 mi | 60 acres |
| Dixon Reservoir | San Diego | 12 mi | 63 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About San Dieguito Reservoir
How Big Is San Dieguito Reservoir?
San Dieguito Reservoir covers 60 acres in San Diego County, California.
What Is the Largest Lake in San Diego County?
Lake Henshaw is the largest lake in San Diego County, at 1,754 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 27830039). Verified October 30, 2026.