Chumash Peak, Mountain summit in San Luis Obispo County, California

Chumash Peak is a 1,257-foot (383 m) volcanic plug in San Luis Obispo County, California, just northwest of San Luis Obispo on the south side of State Route 1. It is one of the Nine Sisters, between Cerro Romauldo to the west and Bishop Peak to the east.

Chumash Peak is one of the volcanic plugs called the Nine Sisters, between Cerro Romauldo and Bishop Peak. In 1964 the hill was named for the Chumash Indians who lived in the area, through efforts by Louisiana Dart, curator of the San Luis Obispo County Museum. In the 1970s the peak was quarried for foundation material used in new buildings on the Cuesta College campus nearby.

The name Chumash Peak was adopted in 1964 to honour the Chumash people who lived in the area of the Nine Sisters, at the request of Louisiana Dart, curator of the San Luis Obispo County Museum. The name is the only Chumash reference recorded for the hill in the sources.

Access to the peak is currently unavailable, so there is no trail to the summit. The hill stands just northwest of San Luis Obispo, on the south side of California State Route 1, between Cerro Romauldo and Bishop Peak. It can be seen from the road but not climbed.

The hill was quarried in the 1970s for foundation material used in new buildings on the Cuesta College campus nearby, so part of its rock now sits under the college. It was named in 1964 through the efforts of Louisiana Dart, curator of the San Luis Obispo County Museum.