San Pablo Bay is a shallow estuary located in California, part of the larger San Francisco Bay system. It is bordered by several cities, including Richmond, San Pablo, and Martinez. The bay is an important habitat for various wildlife species, including migratory birds and fish. The bay is also significant for its recreational opportunities, such as boating, fishing, and birdwatching. It is surrounded by marshlands and tidal flats, which help filter pollutants and provide essential ecosystem services. The area is managed by various organizations to protect its natural resources and promote sustainable use.