Mt. Diablo State Park is home to a variety of outdoor recreational activities, unique geological landmarks, rare plant and animal species, and 20,000 acres of explorable terrain. Don’t miss out on anything Mount Diablo State Park has to offer, read our guide before your next visit!
Make sure to bring plenty of water, sunscreen, comfortable shoes and multiple layers of clothing. If you are planning a long hike, run, walk, bicycle ride or horseback ride please bring plenty of water to ensure a safe and enjoyable visit.
You read that right. Each year between August and October, visitors to Mount Diablo State Park may witness young tarantulas coming out of hiding to find a mate. Please be careful to not harm tarantulas when driving and hiking during this time.
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok