San Francisco Bay, a large natural harbor on the Pacific coast of California, is a defining feature of the region. Enclosed by the San Francisco Peninsula to the west and the East Bay to the east, it connects to the Pacific Ocean through the Golden Gate strait. The bay’s waters are dotted with islands, including the infamous Alcatraz and the picturesque Angel Island. A vital hub for commerce, transportation, and recreation, the bay is traversed by iconic bridges like the Golden Gate and the Bay Bridge, and its shores are lined with bustling cities, ports, and marinas. Its diverse ecosystem supports a variety of marine life and migratory birds, making it both an ecological treasure and a vital part of the cultural and economic landscape of the San Francisco Bay Area.