| Pyramid Lake | |
|---|---|
&sq=Qlik&lang=&file=File:Pyramid_Lake_December_2014.jpg) Pyramid Lake and Topatopa Mountains. | |
&sq=Qlik&lang=&file=File:U.S._-_Los_Angeles_Metropolitan_Area_location_map.svg)  Pyramid Lake &sq=Qlik&lang=&file=File:Relief_map_of_California.png) Pyramid Lake &sq=Qlik&lang=&file=File:Usa_edcp_relief_location_map.png) Pyramid Lake | |
| Location | Angeles National Forest / Los Padres National Forest Los Angeles County, California |
| Coordinates | 34°38′39″N 118°45′51″W / 34.644153°N 118.764258°W |
| Type | Reservoir |
| Primary inflows | West Branch California Aqueduct Piru Creek |
| Primary outflows | West Branch California Aqueduct Piru Creek |
| Basin countries | United States |
| Surface area | 1.97 sq mi (5.1 km2) |
| Average depth | 200 ft (61 m) |
| Max. depth | 355 ft (108 m) |
| Water volume | 222,000 acre⋅ft (274,000,000 m3) |
| Shore length1 | 21 mi (34 km) |
| Surface elevation | 786 m (2,579 ft) |
| References | U.S. Geological Survey Geographic Names Information System: Pyramid Lake |
| 1 Shore length is not a well-defined measure. | |
Pyramid Lake is a reservoir formed by Pyramid Dam on Piru Creek in the eastern Topatopa Mountains, near Castaic, Southern California. It is a part of the West Branch California Aqueduct, which is a part of the California State Water Project. Its water is fed by the system after being pumped up from the San Joaquin Valley and through the Tehachapi Mountains.[citation needed]