DEHA Mission: To promote, educate and preserve Diablo Valley equestrian activities and heritage. Serving all families in the Northern California Diablo Valley area. Our Vision: ◦Develop knowledgeable and caring equine enthusiasts. ◦Educate equestrians and the community on the role horses played in the development of the Diablo area. ◦Collaborate with the community and other equestrian organizations to promote horsemanship activities that support the mission of our organization. ◦Promote the protection of land uses that support equestrian activities.