Formerly, Drunken Indian and Todos Santos is the largest city in Contra Costa County, California, USA, and the 201st largest in the U.S. As of the 2000 census, the city had a total population of 121,780. Originally founded in 1869 as the community of Todos Santos by Salvio Pacheco, the name was changed to Concord within months. The city is a major regional suburban East Bay center within the San Jose/San Francisco Metropolitan Area, and is located just 31 miles (50 km) east of San Francisco.

Suisun Bay (pronounced "suh-soon") is a shallow tidal estuary located at 38°04′N 122°04′W / 38.07°N 122.07°W / 38.07; -122.07 in northern California, USA. It lies at the confluence of the Sacramento and San Joaquin Rivers, thus forming the entrance to the Sacramento-San Joaquin River Delta, an inverted river delta. Suisun Marsh is the tidal marsh land located to the north of the bay. It is the largest marsh in California. On its western end, Suisun Bay is drained by the Carquinez Strait, which connects to San Pablo Bay, a northern extension of San Francisco Bay. In addition to the major bridges at the Carquinez Strait, it is spanned in its center by

 the Benicia-Martinez Bridge and at its eastern end by the State Route 160 crossing (also known as the Antioch Bridge) between Antioch and Oakley. It is especially famous for hosting the anchorage of the ghost or mothball fleet, a collection of U.S. Navy and merchant reserve ships, created in the period following World War II. Many of these ships were removed for sale as scrap metal during the 1990s, but over 80 ships still remain at anchor in the bay including the WWII battleship USS Iowa (BB-61).