SAN FRANCISCO BAY

one of the largest harbors in the world, and the largest and best harbor on the Pacific Coast. Together with San Pablo and _Suisuin bays north of the main body of the harbor, it is about 60 miles in length and from three to 12 miles wide. Its outlet to the Pacific Ocean is the Golden Gate Strait, on the south shore of which stands the city of San Francisco. On the opposite and inside shore of the bay are the important cities of Oakland, Alameda, Berkeley, and further up, Valiejo and the U.S. navy yard, at Mare Island. Almost within the Golden Gate is Alcatraz Island, on which the Federal Government has built fortifications. Two other islands near by are Angel and Goat islands.