Tijuana River

The Tijuana River is an intermittent river, 120 mi (195 km) long, on the Pacific coast of northern Baja California in Mexico and southern California in the United States.It drains an arid area along the U.S-Mexico border, flowing through Mexico for most its course then crossing the border for its lower 5 mi (8 km) to empty into the ocean in an estuary on the southern edge of San Diego.

It rises in the Sierra de Juárez of northern Baja California, approximately 45 mi (70 km) ENE of Ensenada.The mouth of the Tijuana River is the location of the legendary Tijuana Sloughs big-wave surfing break. Alan "Dempsey" Holder, a pioneering California big-wave surfer surfed waves over a mile from shore at the mouth of the Tijuana River starting in the 1930s.