Location: San Bernardino County, California

Named after the nearby San Andreas Fault-carved Pass.

Original name cited as "Muscupaivit" for a nearby Indian village, there was also a Muscupiabe Rancho (1806). Cajon means "box" in Spanish and is a frequent use-name for blind canyons. But this pass was the major point of entry to landlocked Southern California since before the Mission Era. It was used by Pedro Fages (1772), Francisco Garcés (1776), Jedediah Smith(1827). Antonio Armijo opened commerce on the "Old Spanish Trail" to Santa Fe (1829), followed by William Wolfskill (1831), Ewing Young (1832) and William Workman (1841). It was also the site of a major gun-battle in 1874 in a railroad war between the forces of Huntington whose Central Pacific RR was to soon enter LA (1976) and Senator John P. Jones' Los Angeles and Independence RR for right of way. Jones won and went on to found Santa Monica-his "Zenith City by the Sunset Sea".

Peak was on the original 1946 HPS Peak List. Weldon Heald climbed this peak in 1939.