Black Diamond Mines Regional Preserve
5175 Somersville Rd, Antioch, CA 94509
- Type: Nature
- Cost: $5 parking when the kiosk is staffed
- Ages: Little kids 4–7, Big kids 8–12, Teens 13+
- Open: Daily 8 am to 5–8 pm by season · visitor center Fri 10–2, Sat–Sun 10–4
- Setting: Outdoor
Tips from parents
- The underground Coal Mine Experience runs Saturdays and Sundays, ages 7 and up; reserve ahead.
- The Greathouse Visitor Center is free.
- Pick up a Junior Ranger activity book (English or Spanish).
Hours change. Check the website before you go.