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Chumash Peak
Hills in San Luis Obispo.jpg
Chumash Peak is the middle of the three peaks.
Highest point
Elevation 1,268 ft (386 m)  NGVD 29
Geography
Location San Luis Obispo County, California
Parent range Nine Sisters
Topo map USGS San Luis Obispo
Geology
Age of rock 20 million years
Mountain type Volcanic plug

Chumash Peak is a mountain in San Luis Obispo County, California. It stands about 1,257 feet (383 meters) tall. You can find it just northwest of the city of San Luis Obispo. The peak sits on the south side of California State Route 1.

What is Chumash Peak?

Chumash Peak is a special type of mountain. It is a volcanic plug. This means it formed from magma that hardened inside a volcano's vent. Over millions of years, the softer rock around it wore away. This left the harder volcanic rock standing tall. Chumash Peak is about 20 million years old.

Part of the Nine Sisters

Chumash Peak is one of the famous Nine Sisters. These are a chain of nine volcanic plugs. They stretch across San Luis Obispo County. Each peak is a unique natural landmark. Chumash Peak is located between Cerro Romauldo and Bishop Peak.

How Chumash Peak Got Its Name

In 1964, the peak was given its name. It was named to honor the Chumash Indians. These Native American people lived in the area for a very long time. Louisiana Dart, who was a curator at the San Luis Obispo County Museum, helped make this naming happen.

A Look at Its Past

In the 1970s, parts of Chumash Peak were quarried. This means rock was dug out from the mountain. This rock was used as a strong base for new buildings. These buildings were being constructed at the nearby Cuesta College campus. Today, you cannot access the peak directly.

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