Green Friday, Greathouse Visitor Center Open
The underground Greathouse Visitor Center opens for Green Friday so visitors can learn about mining history. Quarter mile walk from the upper lot.
- When
- Fri, Nov 27, 10:00 AM to 2:00 PM
- Where
- Black Diamond Mines Regional Preserve, Greathouse Visitor Center
Antioch, Contra Costa County, California - Organizer
- East Bay Regional Park District
- Cost
- $5 parking fee when the entry kiosk is staffed
- Where we found it
- East Bay Regional Park DistrictChecked November 8, 2026
ameetx did not organize this event. Details can change, so check the source before you go.