Sacramento–San Joaquin River Delta

The Sacramento–San Joaquin River Delta, or California Delta, is an expansive inland river delta and estuary in Central California and Northern California. The delta is formed at the western edge of the Central Valley by the confluence of the Sacramento and San Joaquin rivers and lies just east of where the rivers enter Suisun Bay, which flows into San Francisco Bay, then the Pacific Ocean via San Pablo Bay.

Source: Wikipedia — Sacramento–San Joaquin River Delta (CC BY-SA 4.0)