Mount Diablo Interpretive Association (MDIA) is a non-profit volunteer organization which assists the California Department of Parks and Recreation in maintaining and interpreting Mt. Diablo State Park for its 700,000 visitors each year. Through a continuing program of education, sponsored activities, and publications, MDIA fosters appreciation and the enlightened use of Mount Diablo State Park. MDIA is proud to have played a major part in raising funds for the construction of the Museum atop the summit of Mount Diablo. MDIA has also created and now manages the Mitchell Canyon Visitor Center.