Lakes / Idaho / Custer County / Cape Horn Lakes
Cape Horn Lakes, Idaho
31.38 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Idaho
44.41 degrees N, 115.13 degrees W - Custer 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 Cape Horn Lakes Stacks Up
- Larger than 12% of the 316 lakes counted in Idaho.
- About 63 miles from Ketchum, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Bull Trout Lake | Boise | 9.9 mi | 69.14 acres |
| Stanley Lake | Custer | 12 mi | 180.14 acres |
| Sawtooth Lake | Custer | 17 mi | 173.47 acres |
| Goat Lake | Custer | 18 mi | 43.24 acres |
| Little Redfish Lake | Custer | 21 mi | 63.77 acres |
| Redfish Lake | Custer | 23 mi | 1,503.88 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Cape Horn Lakes
How Big Is Cape Horn Lakes?
Cape Horn Lakes covers 31.38 acres in Custer County, Idaho.
What Is the Largest Lake in Custer County?
Redfish Lake is the largest lake in Custer County, at 1,503.88 acres.
Largest Lakes in Idaho
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Pend Oreille | Bonner | 92,764.44 acres | - |
| 2 | American Falls Reservoir | Power | 55,319.78 acres | - |
| 3 | Coeur d'Alene Lake | Kootenai | 26,891.64 acres | - |
| 4 | Lake Cascade | Valley | 25,043.4 acres | - |
| 5 | Priest Lake | Bonner | 23,425.59 acres | - |
All 316 Idaho lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 51547082). Verified October 30, 2026.