Horse Thief Lake
| Horse Thief Lake | |
|---|---|
| Location | Custer County, South Dakota |
| Coordinates | 43°53′39″N 103°28′47″W / 43.89417°N 103.47972°W |
| Basin countries | United States |
| Surface elevation | 4,905 ft (1,495 m) |
Horse Thief Lake is a lake in Pennington County, South Dakota. It is approximately two miles northwest of Mount Rushmore, the closest lake to the monument. The lake's name is derived from the fact a gang of horse thieves operated there.