The Brazos River ( (listen) BRAZ-əs), called the Río de los Brazos de Dios (translated as "The River of the Arms of God") by early Spanish explorers, is the 11th-longest river in the United States at 1,280 miles (2,060 km) from its headwater source at the head of Blackwater Draw, Curry County, New Mexico to its mouth at the Gulf of Mexico with a 45,000-square-mile (116,000 km2) drainage basin. Being one of Texas' largest rivers, it is sometimes used to mark the boundary between East Texas and West Texas. The river is closely associated with Texas history, particularly the Austin ... Source: Wikipedia