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Black Diamond Mines Regional Preserve
The Black Diamond Mines Regional Preserve is a park located north of Mount Diablo in Contra Costa County, California under the administration of the East Bay Regional Park District (EBRPD). The district acquired the property in 1973. The preserve contains relics of 3 mining towns, former coal and sand mines, and offers guided tours of a former sand mine. The of trails in the Preserve cross rolling foothill terrain covered with grassland, California oak woodland, California mixed evergreen forest, and chaparral. History Natural History Indigenous People Long before the widespread ranching and mining activity that took place in the area, indigenous people had a presence in the Bay Area for 13,000 years. Three Bay Miwok tribes, the Chupcan, Ompin, and Volvon, lived in the areas surrounding the Black Diamond Mines Regional Preserve. The Chupcan occupied territory to the west of the preserve near Concord, the Volvon occupied the territory to the south including much o ...
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