In the early 1970’s the East Bay Regional Park District began acquiring land for Black Diamond Mines Regional Preserve. The mining district on the land has nearly 6,096 acres of land. Black diamond mines was split between 3 tribes Chupcan, Volvon, Ompin. After the mines closed the miners started a new career with ranching till this day the descendants mining families still graze cattle in the preserve. They Miwok language was spoken amongst all 3 tribes. There are many things to do at the Black Diamond mines Hiking, camping, Tours of the Rose Hill Cemetery, Hazel-Atlas Mine, Greathouse Visitor Center, Sidney Flat Visitor center and so much more.
Contact Info: : 510-544-2750, http://www.ebparks.org/parks/black_diamond