Gates open 8:00am and close at sunset. Visitors should plan to be in their vehicles by sunset and headed out to avoid being locked in.
Mount Diablo State Park
Max. Trailer Lengths
Trailer: 20 Feet
Camper/Motorhome: 20 Feet
Driving Directions to Mount Diablo SP
Camping and Lodging
Online reservations are available 24 hours a day, seven days a week. Reservations can be made 7 months in advance on the first day of the month beginning at 8:00 a.m. PST via the website, by mail, or by calling the toll free telephone number at 1-800-444-7275. Due to seasonal volume, access to the ReserveAmerica website and the telephone line may at times be limited.Online Reservations
Brochures and Campground Maps
Castle Rock Area In Mount Diablo State Park to Close for Falcon Nesting Season
Walnut Creek, Calif.--The area known as “Castle Rock” in Mount Diablo State Park will be closed off to visitors from February 1st to July 31st to help protect the Peregrine Falcon during their nesting season.
Please Conserve Water - Every Drop Counts
California is still experiencing a drought. The majority of the water used by park visitors at Mount Diablo State Park is produced through a series of springs that is fed to various water storage tanks. Please conserve water and make every drop count.
Dogs at Mount Diablo State Park
Dogs are allowed only in developed areas of the park. They must be kept on a leash during the day and in an enclosed vehicle or tent at night. Dogs are NOT permitted on trails or fire roads.
Facilities - Activities
Many visitors to Mount Diablo head straight for the Summit to enjoy the famous view. Summer days are sometimes hazy, and the best viewing is often on the day after a winter storm. Then, you can look to the west, beyond the Golden Gate Bridge, to the Farallon Islands; southeast to the James Lick Observatory on Mount Hamilton at 4,213 feet elevation; south to Mount Loma Prieta in the Santa Cruz Mountains at 3,791 feet elevation, north to Mount Saint Helena in the Coast Range at 4,344 feet elevation, and still farther north to Lassen Peak in the Cascades at 10,466 feet. North and east of Mount Diablo the San Joaquin and Sacramento Rivers meet to form the twisting waterways of the Delta. To the east beyond California's great central valley, the crest of the Sierra Nevada seems to float in space.
Summit Visitor Center - Open Daily 10am - 4pm
The Visitor Center is located in the historic stone building atop Mount Diablo's highest peak. The tower was constructed during the late 1930's of fossiliferous sandstone blocks quarried in the park. The Visitor Center highlights the cultural and natural history of the park.
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. A diorama, complete with sound, offers an overview of the park's ecosystems, and its cultural history. A model of the mountain acquaints visitors with important park locations. Splendid artwork and photographs enhance the visitor's experience. A gift shop and audio-visual room are also located in the building.
Accessible parking and ground level entry are provided and a generally accessible restroom is available inside the Visitor Center for use by persons with mobility disabilities. Additional non-compliant restrooms are located outside of the Visitor Center.
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 Mount 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.
Hike the Mary Bowerman Trail!
Dedicated to Mary Bowerman author of Flowering Plants and Ferns of Mount Diablo and founding member of Save Mount Diablo. An easy short [0.7 mile] hike that encircles the Summit area. Excellent views. Self-guided pamphlet available. The first third of the trail is paved and accessible. Park in the Lower Parking Lot of the Summit. The trail takes off before the steep section of Summit Road that leads to the Upper Parking Lot.
Explore Rock City!
Located off of South Gate Road approximately one mile north of South Gate Kiosk. Features include the Wind Caves, Elephant Rock, Sentinel Rock, Artist Point and Fossil Ridge. Native American grinding rocks are located near Grotto. A great place to picnic.
There are over 150 miles of hiking trails and fire roads within Mount Diablo State Park. Hiking is a great way to explore the park's backcountry. There are a number of ways to hike to the Summit. A popular route is to take the Juniper Trail from the Diablo Valley Overlook [entrance to Juniper Campground]. It's just over a mile to the Summit one-way. Carry water and be prepared for changing weather conditions. Consult a trail map for additional details.
Make a trip to the Mitchell Canyon Staging Area!
Located on the north side of the mountain, Mitchell Canyon is accessed by taking Ygnacio Valley Road to Clayton Road to Mitchell Canyon Road. A number of trails take off from Mitchell Canyon that range from easy to difficult. A small visitor center is located here, open on weekends and holidays. The Mitchell Canyon area is noted for its wildflower displays during spring. The Mitchell Canyon Staging Area is a good starting point for equestrians.
Diablo Valley Overlook
From here near Juniper Campground, 2,900 feet above sea level, you can see the Golden Gate Bridge.
Fires are a continuing threat at Mount Diablo. Weather conditions may restrict smoking, prohibit fires or even close the park during periods of extreme fire danger. See park staff for specific information. Fires are only allowed in the park’s barbecues or in your portable camp stove. Collection of firewood is prohibited in the park.
Available Activities and Facilities at Mount Diablo State Park
Hike or Bike Campsites
Env. Learning/Visitor Center
Exhibits and Programs
Nature & Wildlife Viewing
Restrooms / Showers
Drinking Water Available