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Location
Accessibility
Elevator available from lower level entrance to upper museum floor and observation roof
Visitor tip
Call ahead at 925-837-2525 to confirm operating hours before visiting, then check in at the lower level Welcome Desk and take the elevator up to explore the museum and observation roof while examining the ancient marine fossils embedded in the sandstone walls
Visitor tip
Don't skip the observation deck visit - use it as an interactive learning experience to examine actual ancient marine fossils embedded directly in the sandstone walls while enjoying panoramic views
Quick Facts
- Type
- Natural History Museum
- Location
- Mount Diablo Summit in historic 1930s stone building
- Highlights
- 15-million year old oyster fossils, geological exhibits, Native American history, observation deck with panoramic views
- Admission
- Free museum admission; park entry fee required
- Hours
- Daily 10 am to 4 pm
- Accessibility
- Elevator to upper floors and observation roof
What visitors say
Went on MLK Day and the park had free entrance which was amazing! Did a few trails and the views are really nice. Its a good place for a chill day trip! It does get crowded and the parking scene can get bad but theres plenty of parking…
Beautiful view! Longish drive, one hour, on tight curved roads without guard rails. But worth it! Visitor Center is nice.
I usually stay around rock city and never once did i decide to go to the very top!! Let me tell you it’s a must. I went and there were extremely clear 360 views of the surrounding area. I could see the sf bridge, San Mateo bridge,…
From 860 Google reviews Read all reviews
Did You Know?
- Ancient marine fossils are embedded directly in the sandstone walls of the visitor center building, allowing visitors to examine 300+ million-year-old specimens during their observation deck visit
- The visitor center's beacon is illuminated once yearly on December 7 in memory of Pearl Harbor, serving as a historical commemorative tradition
- Mount Diablo Summit Visitor Center offers 360-degree views visible from the observation deck, including the Golden Gate Bridge, San Mateo Bridge, and Antioch Bridge in a single panoramic view
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