Lakes / California / Siskiyou County / Greenhorn Reservoir
Greenhorn Reservoir, California
27 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
41.71 degrees N, 122.65 degrees W - Siskiyou 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 Greenhorn Reservoir Stacks Up
- Larger than 6% of the 1,147 lakes counted in California.
- About 225 miles from Sacramento, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bass Lake | Siskiyou | 8.3 mi | 82 acres |
| Trout Lake | Siskiyou | 9.3 mi | 143 acres |
| Steamboat Lake | Siskiyou | 10 mi | 193 acres |
| Barton Lake | Siskiyou | 12 mi | 29 acres |
| Big Lake | Siskiyou | 15 mi | 54 acres |
| Lake Shastina | Siskiyou | 19 mi | 675 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Greenhorn Reservoir
How Big Is Greenhorn Reservoir?
Greenhorn Reservoir covers 27 acres in Siskiyou County, California.
What Is the Largest Lake in Siskiyou County?
Tule Lake is the largest lake in Siskiyou County, at 7,403 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 103361887). Verified October 30, 2026.