San Pablo Bay
an arm of the Pacific Ocean which penetrates California and is connected with San Francisco bay. In it is Mare Island. It washes the shores of Sonoma, Contra Costa, and Marin counties. It is united with Suisun bay by the strait of Carquinez, the outlet of all the water which collects in the great central valley of the state. Length, 13 miles. SAN PAULO. See SÃO PAULO.