Sacramento River San Joaquin River Petaluma River Napa River Guadalupe River
Ocean/sea sources
Pacific Ocean
Basin countries
United States
Max. length
97 km (60 mi)
Max. width
19 km (12 mi)
Surface area
400–1,600 sq mi (1,000–4,100 km2)
Average depth
12–15 ft (3.7–4.6 m)[2]
Max. depth
372 ft (113 m)
Settlements
San Francisco San Jose Oakland
Ramsar Wetland
Official name
San Francisco Bay/Estuary (SFBE)
Designated
February 2, 2013
Reference no.
2097[3]
San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, San Jose, and Oakland.
San Francisco Bay drains water from approximately 40 percent of California. Water from the Sacramento and San Joaquin rivers, and from the Sierra Nevada mountains, flow into Suisun Bay, which then travels through the Carquinez Strait to meet with the Napa River at the entrance to San Pablo Bay, which connects at its south end to San Francisco Bay. It then connects to the Pacific Ocean via the Golden Gate strait. However, this entire group of interconnected bays is often called the San Francisco Bay. The bay was designated a Ramsar Wetland of International Importance on February 2, 2013, and the Port of Oakland on the bay is one of the busiest cargo ports on the west coast.
^"San Francisco Bay". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. January 19, 1981. Retrieved January 2, 2017.
^"Anatomy of the Bay: 7 bites of San Francisco Bay history, science, and lore". July 6, 2016. Retrieved May 24, 2023.
^"San Francisco Bay/Estuary (SFBE)". Ramsar Sites Information Service. Retrieved April 25, 2018.
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