| Mammoth Pool Reservoir | |
|---|---|
 | |
  Mammoth Pool Reservoir  Mammoth Pool Reservoir | |
| Location | Sierra National Forest Fresno County, California Madera County, California |
| Coordinates | 37°21′15″N 119°18′32″W / 37.3541°N 119.309°W |
| Type | Reservoir |
| Primary inflows | San Joaquin River |
| Primary outflows | San Joaquin River |
| Catchment area | 998 sq mi (2,580 km2) |
| Basin countries | United States |
| Max. length | 5 mi (8.0 km) |
| Max. width | 1.5 mi (2.4 km) |
| Surface area | 1,100 acres (450 ha) |
| Water volume | 123,000 acre⋅ft (152,000,000 m3) |
| Surface elevation | 3,330 ft (1,010 m) |
| References | U.S. Geological Survey Geographic Names Information System: Mammoth Pool Reservoir |
Mammoth Pool Reservoir is a reservoir on the San Joaquin River in the Sierra Nevada, within the Sierra National Forest in California. It creates the border between Fresno County and Madera County. It is about 45 miles (72 km) north-northeast of Fresno.