Is San Francisco Bay salt water?
Is San Francisco Bay salt water? San Francisco Bay is an estuary, where salt water and fresh water mix to form a rich and unique ecosystem that benefits fish, wildlife and people.
How deep is the water around Alcatraz?
The bay is actually only as deep as a swimming pool. Heck, between Hayward and San Mateo to San Jose it averages 12 to 36 inches. So much for that bridge! With that said though, the water surrounding Alcatraz is on the deeper end of the scale, but still, it's just an average depth of 43 feet.