Pico Blanco, which splits the north and south forks of the Little Sur River, was sacred in the native traditions of the Rumsien and the Esselen, who revered the mountain as a sacred place from which all life originated. The Spanish mission system led to the virtual destruction of the Indian population. Estimates for the pre-contact populations of most native groups in California have varied substantially. Alfred L. Kroeber suggests a 1770 population for the Esselen of 500. Sherburne F. Cook raises this estimate to 750. A more recent calculation (based on baptism records and density) is that they numbered 1,185-1,285.