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Welcome to the Mount Diablo Interpretive Association Website

Mount Diablo Interpretive Association (MDIA) is a non-profit all-volunteer organization that assists the California Department of Parks and Recreation in maintaining and interpreting Mount Diablo State Park for its 700,000 visitors each year. Through education, sponsored activities and publications, MDIA fosters appreciation and the enlightened use of Mount Diablo State Park. MDIA is proud to provide the resources necessary to keep the Summit Museum and Mitchell Canyon Visitor Center open throughout the year. In addition, one of MDIA’s key roles is coordinating the “Volunteers in Parks,” program, which trains and manages park docents, sponsors guided hikes, and helps maintain trails.

Water Shortage in Mount Diablo State Park
updated 11/10/14

California is in the midst of its third straight year of drought. The entire state is in some stage of drought with more than 77% of the state experiencing “extreme” to “exceptional” drought conditions. 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 tanks. Once at the water tank, the water is treated and tested before being ready for public use. However, with the lack of rain the past three years, the springs on the mountain have been reduced to a trickle and water tanks are close to empty.

In order to meet the park’s basic water needs until the rainy season, the park has been forced to take a number of drastic measures in order to conserve water:

• All water faucets located in the picnic areas and Rock City have been turned off as a result of the drought.

• Live Oak Campground is closed on a seasonal basis from November 1 through March 31.

• Flush toilets are available at Juniper Campground, the Lower Summit Parking Lot and the Upper Summit Parking Lot.

• The water has been turned on at Juniper Campground, with restrooms, showers and water faucets available for use.


If you are planning a long hike, run, walk, bicycle ride or horseback ride, please bring plenty of water to ensure a safe and enjoyable visit. It is not unusual for heat-related illnesses (heat cramps, heat exhaustion and heat stroke) to occur at Mount Diablo State Park during the late spring, summer and early fall seasons. Although many of these illnesses can be treated without hospitalization, some heat related illnesses have proven fatal to park visitors in the past. By taking the necessary precautions, the vast majority of visitors enjoy a safe and memorable visit to Mount Diablo in all seasons.

Volunteer Opportunities

MDIA encourages the public to join our organization and become involved in its mission to support the park. We are always looking for dedicated volunteers to lead or help with various programs, outreach and operations. Volunteers can commit to as little as a couple of hours a week or volunteer on a project-specific, ad hoc basis and still provide vital assistance.(read more).

New - Men's - White Mount Diablo Bike Jerseys For Sale. Just In Time For The Holidays

This bike jersey is great for those celebrating a ride to Mount Diablo's Summit or anyone who loves Mount Diablo.
   MDIA Jersey White medium Front MDIA Jersey White medium Back

Short sleeve cycling jersey with full concealed zipper in a "club cut" ("relaxed American fit"). 100% Polyester. Jersey has three rear pockets and has the California State Park Seal on the shoulders and Mt. Diablo Summit Elevation (3849 Feet) on the back. 
White is available only in MENS sizes medium, large, extra large and 2X.
On sale at the Mount Diablo State Park Summit Visitors Center and on line on this website.

Original Green Jerseys are also available for sale in men's and women's sizes

Maintenance Volunteer Group Completes Renovation of Live Oak Campfire Center

After several months of hard work, the Maintenance Volunteer Group at Mount Diablo State Park completed renovations to the Live Oak Campfire Center. The benches and stage were rebuilt and the projection screen cover was re-shingled and painted. In addition, a new computer/projector table was built using recycled redwood from the old benches. Photos below show the campfire center before and after, along with the volunteer group who worked on the project. A big thank you to Steve Williams, Jim Gray, Spencer Fulweiler, and Jim Mitchell for all their hard work! MDIA sponsored and coordinated the work for this project and purchased all of the materials. Visitors can now enjoy the summer campfire programs in style.


New Picnic Area at the Summit

Mount Diablo State Park is pleased to announce that a new picnic area is now available at the Summit. Located at the Lower Summit, this new picnic area offers a variety of picnic tables (some sun shaded), cook grills and paved walkways. Fully handicap accessible, this new area is well suited for family or group gatherings. Also, there are nearby restrooms, interpretive panels and an impressive scenic overlook.
 ADA picnic area no people Dsc00038

Citizen scientists: help monitor fire recovery!
Check out the four camera stations along the Mary Bowerman (Fire Interpretive) Trail and other locations in the Morgan Fire burn area. Please take photos with your smart phone and upload them to social media. Our partner group Nerds for Nature will use the photos to create a time-lapse video of the landscape recovering and changing over the next several years. Please participate when you see the stations and be a part of studying the fire recovery. Contact Cyndy Shafer at
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