Explore the Black Diamond to Mt Diablo Trail Historic Corridor

Somersville Staging Area Black Diamond Mines Regional Preserve, Antioch, CA

All Discover Diablo hikes are subject to, and will honor, all applicable COVID-19–related restrictions in place for our area.Join founding Save Mount Diablo Board member and retired EBRPD General Manager…

Free

Black Diamond Mines Halloween Hike

Somersville Staging Area Black Diamond Mines Regional Preserve, Antioch, CA

All Discover Diablo hikes are subject to, and will honor, all applicable COVID-19–related restrictions in place for our area.Come celebrate Halloween on the trails of Black Diamond Mines Regional Preserve…

Free

Join us to save the remaining natural lands of Mount Diablo!

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