SACRAMENTO RIVER

river rising in the Klamath Mountains, near Mt. Shasta (in Siskiyou County), northern California, U.S., and flowing 382 mi (615 km) south-southwest between the Cascade and Sierra Nevada ranges, through the northern section (Sacramento Valley) of the Central Valley; it forms a common delta with the San Joaquin River before entering the north arm of San Francisco Bay. Its principal tributaries are the Pit, McCloud, Feather, and American rivers. Total drainage area is about 27,100 sq mi (70,189 sq km); average annual runoff 22,000,000 ac-ft (2.7 1010 cu m). Shasta, Keswick, and Oroville dams are key features of the Central Valley and Feather River irrigation and power projects, which serve southern portions of the state. California's largest river, the Sacramento is navigable for 256 mi and accommodates oceangoing vessels as far as the city of Sacramento. The name Sacramento was originally given to the Feather River by Gabriel Moraga in 1808; it was later applied to the main channel (originally called Rio de San Francisco). Scene of the Gold Rush of 1849, the river flows through one of the world's richest agricultural regions.