| Harper Lake | |
|---|---|
 Harper Dry Lake Marsh, diminished by years of agricultural diversion | |
  Harper Lake  Harper Lake | |
| Location | Mojave Desert San Bernardino County, California |
| Coordinates | 35°01′50″N 117°17′24″W / 35.0305°N 117.2900°W |
| Lake type | Endorheic basin |
| Basin countries | United States |
| Max. length | 16 km (9.9 mi) |
| Max. width | 7 km (4.3 mi) |
| Shore length1 | 45 km (28 mi) |
| Surface elevation | 617 m (2,024 ft) |
| Settlements | Lockhart, California |
| References | U.S. Geological Survey Geographic Names Information System: Harper Lake |
| 1 Shore length is not a well-defined measure. | |
Harper Lake is a dry lake located in the Mojave Desert near the small community of Lockhart, California, in northwestern San Bernardino County of Southern California. The lake is accessible from Harper Lake Road, which runs north off of State Route 58 midway between Boron and Barstow.