Audio Tours of Mount Diablo
Experience an Audio Tour Here
The tours feature lively interviews and music with the rush of wind and the chirps, howls, and growls of wildlife, all downloadable to an audio video media player

Wildflower Identification Guide

calochortus pulchellus logo mjw

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Summit Museum

Also visit the Mitchell Canyon Visitor Center on the north side of the mountain.

Summit Visitor Center

The Summit Visitor Center is located in the historic stone building atop Mt. Diablo's highest peak. The tower was constructed during the late 1930's of fossiliferous sandstone blocks quarried in the park.

Renovated in 2010, the Visitor Center highlights the cultural and natural history of Mt. Diablo State Park.

See the Park Location Page for directions
Open Daily 10am to 4pm 925-837-6119

Also look at the Article on the history of the Summit Building - Mt. Diablo Review by Linda Sanford


Impressive exhibits chronicle the history of the mountain and capture its majesty. A rock wall with instructional video examines the geological forces which created the mountain. Panels describe the native American history of the region. A diorama, complete with native sounds, offers an overview of the park's ecosystems. A model of the mountain acquaints visitors with important park locations. Splendid photographs enhance the visitor's experience.

In addition to the exhibits, the summit museum features a gift shop and audio-visual room. An elevator is available from the lower level entrance to the upper museum floor and observation roof. Check-in at lower level Welcome Desk.

Observation Deck

Telescopes are mounted on the deck to help visitors enjoy one of the finest views in the world. On the walk up the circular stairway to the observation deck, visitors are treated to a look at ancient marine fossils embedded in the sandstone walls of the summit building. In the rotunda they are reminded of Mt. Diablo's importance as a survey point. Above the rotunda is a beacon, historically important to aviators and now lighted once a year on December 7 in memory of those who lost their lives at Pearl Harbor.

Clam Fossil

15-million year old oysters decorate
the buildings exterior walls.

Summit Clam Fossil

Idaho visitor examines fossil embedded
in the building stones.

Museum Hours and Fees

The museum is open daily from 10 AM to 4:00 PM
You can call the park at 925-837-2525 to confirm that both the park and museum are open and verify hours of operation. Visitor Center telephone 925-837-6119.

There is a park entry fee. Admission to the museum is free.