Lakes / California / San Luis Obispo County / Lopez Reservoir
Lopez Reservoir, California
29 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
35.17 degrees N, 120.54 degrees W - San Luis Obispo 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 Lopez Reservoir Stacks Up
- Larger than 9% of the 1,147 lakes counted in California.
- About 116 miles from Fresno, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lopez Lake | San Luis Obispo | 3.6 mi | 586 acres |
| White Lake | San Luis Obispo | 8.5 mi | 45 acres |
| Laguna Lake | San Luis Obispo | 11 mi | 100 acres |
| Oso Flaco Lake | San Luis Obispo | 11 mi | 40 acres |
| Santa Margarita Lake | San Luis Obispo | 11 mi | 146 acres |
| Twitchell Reservoir | Santa Barbara | 17 mi | 156 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lopez Reservoir
How Big Is Lopez Reservoir?
Lopez Reservoir covers 29 acres in San Luis Obispo County, California.
What Is the Largest Lake in San Luis Obispo County?
Lake Nacimiento is the largest lake in San Luis Obispo County, at 2,985 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 27973566). Verified October 30, 2026.