Somersville Rd. SE of Antioch, Antioch, California. County/parish: Contra Costa.
Added to the National Register of Historic Places October 02, 1991. NRIS 91001425.
3 contributing sites.Also known as:
The Black Diamond Mines Regional Preserve is a 6,000-acre (2,400 ha) 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 60 miles (97 km) of trails in the Preserve cross rolling foothill terrain covered with grassland, California oak woodland, California mixed evergreen forest, and chaparral.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/123858507