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Welcome to the Mount Diablo Interpretive Association Website

Mount Diablo Interpretive Association (MDIA) is a non-profit 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, and through the Volunteers in the Park Program, train and manage the many park docents, sponsor guided hikes, and help maintain trails.

Water Shortage in Mount Diablo State Park
With perhaps the worst drought that California has ever seen, Mount Diablo is suffering from a severe water shortage. Most of the water in the park is produced through a series of springs that feed into various water tanks, where the water is treated, tested, and readied for the public to use. However, with the lack of rain, the springs on the mountain have been reduced to a trickle.

In order to meet the park’s basic water needs, the park has been forced to take a number of drastic measures. Most of the park’s permanent flushing restrooms have been closed and porta-potties have been rented and placed nearby. The showers and water faucets in the campground have been shut off. Many of the water faucets in other locations within the park have been shut off.

In order to avoid dehydration, please bring plenty of water to drink.

Volunteer Opportunities 
The Association encourages the public to join MDIA and become involved in its mission to support the park. We are always looking for dedicated volunteers to take charge of 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)

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Mount Diablo Celebration April 26 - April 27, 2014

A two-day event celebrating "all things Mount Diablo" is scheduled for April 26 and April 27, from 10:00 a.m. to 4:00 p.m. at Mount Diablo State Park. The “Celebrate on the Mountain” weekend is dedicated to creating memorable experiences for participants.
Visitors will have the opportunity to explore the park at five distinctive park locations and engage in various activities, such as docent-led hikes, demonstrations and interpretive presentations. Informational and activity booths from local organizations and agencies will be featured, along with many nature activities for children.

“Celebrate on the Mountain” is a joint event of California State Parks and Mount Diablo Interpretive Association. The event commemorates significant milestone anniversaries of each entity: the 150th Anniversary of State Parks, and MDIA’s 40th year of service to the park.

For more information on the event, a schedule of activities and a map, click here or the banner above.

America’s Greatest Race, AMGEN Tour of California returns to Mount Diablo State Park May 13, 2014 - VOLUNTEERS NEEDED
AMGEN TOC 2013 Stage 7 Mt. Diablo Finish by Clayton Worsdell for MDIA144 1As America's most successful cycling race, the Amgen Tour of California is one of the nation’s largest and most recognized annual sporting events.  An eight-day event, this prestigious cycling road race features elite professional teams and athletes from around the world.  One of only two American races listed as a UCI 2.HC event on the international professional cycling calendar, the Amgen Tour of California awards important, world-ranking points to the top finishers.  The Amgen Tour of California brings the drama and excitement of professional cycling to California for the eighth consecutive year in 2013. 
Fans and spectators will once again be able to line the roads of Mount Diablo State Park to cheer their favorite riders and teams. The park will host the stage 3 finish at the upper summit parking lot after the riders ascend the 10 mile park road from the south gate entrance. 
Similar to last year the park will have use restrictions on race day to ensure public and rider safety. California State Parks supports equal access. Prior to arrival, visitors with disabilities who need assistance should contact the park at 925-837-2525.
Mark your calendars for this awesome event: 05.13.14 | Stage 3 Summit Finish

Mount Diablo State Park is hoping to recruit several hundred volunteers as course marshals, in hospitality, in media support and other volunteer roles. To register as a prospective volunteer please visit 
Additional information is also available on Facebook at

 Enjoy this video preview of the 2014 ATOC, especially Stage 3 at the 2 minute mark.
Live Oak Campground Bathroom Gets an Upgrade
IMG 0958IMG 1016The Volunteer Maintanance Group led by Stephen Williams and supported by MDIA has completed maintanance and painting of the Live Oak Campground Bathroom. A dedicated group of volunteers spent most Mondays since February scraping off old paint, restoring rotted wood and painting the entire exterior of the building. Volunteers for this project were Steve Elliott, Jim Gray, Spencer Fulweiller, Jim Mitchell and Steve Williams. Unfortunatly, due to the drought, the showers and most of the bathroom will remain closed this season. Pre and post pictures show the improvement made.

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.
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Citizen scientists: help monitor fire recovery!
CameraStation04Check 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 This email address is being protected from spambots. You need JavaScript enabled to view it. .