Become a Member
MDIA counts on your support to provide docents for the visitor centers, sponsor the Junior Ranger program, guide hikes, and provide interpretive material and publications to park visitors. In addition, MDIA member volunteers spend countless hours each year working side by side with park staff to insure that visitors continue to enjoy Mount Diablo State Park to its fullest.
Mount Diablo Interpretive Association is an all-volunteer organization dedicated to supporting Mount Diablo State Park. We are a 501(c)(3) organization, and our Tax ID# is 23-7444529.
All Net Proceeds from dues, donations, and sales of publications directly support Mount Diablo State Park. Dues and donations are tax-deductible to the full extent allowed by the law.