Oakland Estuary

37°47′41.02″N 122°18′54.92″W / 37.7947278°N 122.3152556°W / 37.7947278; -122.3152556

A view over the estuary from above Coast Guard Island. Alameda is on the left, with Oakland on the right and San Francisco Bay in the distance.

The Oakland Estuary is the strait in the San Francisco Bay Area, California, separating the cities of Oakland and Alameda and the Alameda Island from the East Bay mainland. On its western end, it connects to San Francisco Bay proper, while its eastern end connects to San Leandro Bay.