Cosumnes River
| Cosumnes River | |
|---|---|
The Lower Cosumnes River near the Cosumnes River Preserve | |
Map of the Mokelumne River watershed, with the Cosumnes River highlighted | |
| Location | |
| Country | United States |
| State | California |
| Cities | Plymouth, Rancho Murieta, Sloughhouse, Wilton, Elk Grove, Galt. |
| Physical characteristics | |
| Source | Sierra Nevada |
| • location | Confluence of North and Middle Forks, El Dorado County |
| • coordinates | 38°33′13″N 120°50′50″W / 38.55361°N 120.84722°W |
| • elevation | 787 ft (240 m) |
| Mouth | Mokelumne River |
• location | Near Galt, Sacramento County |
• coordinates | 38°15′20″N 121°26′21″W / 38.25556°N 121.43917°W |
• elevation | 13 ft (4.0 m) |
| Length | 52.5 mi (84.5 km) |
| Basin size | 724 sq mi (1,880 km2) |
| Discharge | |
| • location | Michigan Bar |
| • average | 492 cu ft/s (13.9 m3/s) |
| • minimum | 0 cu ft/s (0 m3/s) |
| • maximum | 93,000 cu ft/s (2,600 m3/s) |
| Basin features | |
| Tributaries | |
| • left | Middle Fork Cosumnes River |
| • right |
|
The Cosumnes River is a river in northern California in the United States. It rises on the western slope of the Sierra Nevada and flows approximately 52.5 miles (84.5 km) into the Central Valley, emptying into the Mokelumne River in the Sacramento-San Joaquin Delta.
The Cosumnes is one of very few rivers in the western Sierra without major dams. The Nature Conservancy's Cosumnes River Preserve is located just upstream from the Delta. Towns and cities along the Cosumnes River include Plymouth, Rancho Murieta, Sloughhouse, Wilton, Elk Grove, and Galt.
The California Office of Environmental Health Hazard Assessment has issued an advisory regarding fish caught from the body of water.