It is surrounded by the states of Baja California , Baja California Sur , Sonora , and Sinaloa . It is bordered by the states of Baja California , Baja California Sur , Sonora , and Sinaloa with a coastline of approximately 2500 m. Rivers which flow into the Gulf of California include the Colorado , Fuerte , Mayo , Sinaloa , Sonora , and the Yaqui .