Black Diamond Mines Regional Preserve
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 tow
What awaits
Reported. Visitors and staff have reported unexplained activity at Black Diamond Mines Regional Preserve.
Sources: Wikipedia: Black Diamond Mines Regional Preserve, National Register of Historic Places (NPS), NRHP nomination file (NARA), Wikipedia.
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Plan your visit.
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Everything before the scream
Warnings & accessibility
Expect low light, uneven ground and sudden sounds at most haunted attractions. Ask the operator about reduced-sensory options.
Weather & policies
Hours, prices, access and events change. Confirm with the operator before you travel, especially in severe weather.
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