The Old Salt Lake was a historic site in coastal Southern California where sea salt was harvested for barter or sale. Old Salt Lake was a large pond that was 600 ft (180 m) by 1,800 ft (550 m), fed by a natural spring. The lake was 600 ft (180 m) from what is now the Redondo Beach seashore at an elevation of about 10 ft (3.0 m).