Lakes / California / Siskiyou County / Castle Lake
Castle Lake, California
49 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - California
41.23 degrees N, 122.38 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 Castle Lake Stacks Up
- Larger than 32% of the 1,147 lakes counted in California.
- About 189 miles from Sacramento, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Siskiyou | Siskiyou | 4.4 mi | 434 acres |
| Toad Lake | Siskiyou | 7.2 mi | 26 acres |
| Little Crater Lake | Siskiyou | 8.7 mi | 27 acres |
| Deadfall Lakes | Siskiyou | 8.8 mi | 28 acres |
| Dwight Hammond Reservoir | Siskiyou | 11 mi | 54 acres |
| Lake McCloud | Shasta | 17 mi | 481 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Castle Lake
How Big Is Castle Lake?
Castle Lake covers 49 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 92981356). Verified October 30, 2026.