Lakes / California / San Luis Obispo County / Whale Rock Reservoir
Whale Rock Reservoir, California
524 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
35.46 degrees N, 120.87 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 Whale Rock Reservoir Stacks Up
- Larger than 82% of the 1,147 lakes counted in California.
- About 107 miles from Fresno, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Atascadero Lake | San Luis Obispo | 12 mi | 27 acres |
| Laguna Lake | San Luis Obispo | 17 mi | 100 acres |
| Lake Nacimiento | San Luis Obispo | 20 mi | 2,985 acres |
| Santa Margarita Lake | San Luis Obispo | 23 mi | 146 acres |
| Lake San Antonio | Monterey | 25 mi | 823 acres |
| Lopez Reservoir | San Luis Obispo | 27 mi | 29 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Whale Rock Reservoir
How Big Is Whale Rock Reservoir?
Whale Rock Reservoir covers 524 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 120028217). Verified October 30, 2026.