Black Diamond Mines Regional Preserve

The East Bay Regional Park District began acquiring land for Black Diamond Mines Regional Preserve in the early 1970s.

Audible Mount Diablo's Newest Video Podcast Guide, “Black Diamond Mines Regional Preserve” - Save Mount Diablo

Photos from Black Diamond Mine Regional Preserve's new coal mine experience opens

Black Diamond Mines Regional Preserve

Black Diamond Mines Wildflowers - Charlie Russell Nature Photography

File:Black Diamond Mines Regional Preserve - panoramio (2).jpg - Wikimedia Commons

File:California - Black Diamond Mines Regional Preserve - 20180707120656.jpg - Wikimedia Commons

Black Diamond Mines Regional Preserve: Old Homestead Loop - Save Mount Diablo

Happy weekend and happy trails everyone 🤗🥾 📍black diamond mines regional preserve , Antioch CA ! . . . . . . . . . #freshair…

Black Diamond Mines Regional Preserve, Antioch, California Stock Photo - Alamy