Golden Gate

Strait, in California, western coastal U.S., connecting San Francisco Bay with the Pacific Ocean and separating San Francisco from Marin County. An ancient river mouth, it is about 3 miles (5 km) long, from 1 to 3 miles wide, and 300 feet (90 m) deep and serves as the ocean gateway to the port cities of the bay and the Sacramento - San Joaquin river system. The strait, now spanned by the Golden