Mount Diablo State Park is one of the ecological treasures of the San Francisco Bay Area. Every season in the park has its special qualities. Discover them for yourself, from the mountain's 3,849-foot summit to its beautiful wildflowers, extensive trail system, fascinating wildlife, and distinctive rock formations.
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.
Take a tour from the comfort of your home using a computer or while on the trail with your smartphone. Audible Mount Diablo provides a 16-part audiovisual collection of the sights and sounds of Mount Diablo State Park.
MDIA hosts a variety of hikes and talks throughout the year and is now offering webinars as well. View our events page and register for upcoming activities.
Welcome to the Mount Diablo
Interpretive Association Website
The 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 the Parks Program, which trains and manages park docents, sponsors guided hikes, and helps maintain trails.
Summit Nature Programs
Nature Presentations are at the Summit with Naturalist experts. No reservations required. Upcoming programs are posted in Events.
Sign up for MDIA's e-newsletter
for updates about park events and opportunities to get involved.