Discover the Mystique of Black Diamond Mines Regional Preserve

Getting There

• Car

  From Redwood National and State Parks, head south on US-101 S. Continue on US-101 S for approximately 80 miles. Take the exit for CA-4 E towards Stockton. Merge onto CA-4 E and continue for about 25 miles. Take the exit for Somersville Road. Turn right onto Somersville Road, and Black Diamond Mines Regional Preserve will be on your right at 5175 Somersville Rd, Antioch, CA 94509. There is no entrance fee for the park.

• Public Transportation

  From Redwood National and State Parks, you will need to take a combination of local buses to reach Antioch. First, take a bus to the nearest Amtrak station or Greyhound station. From there, board a train or bus heading towards Antioch. Once you arrive in Antioch, you can take a local bus (such as the Tri Delta Transit Route 392) to get to Somersville Road. Make sure to check the schedule for the last bus back, as services may be limited in the evening. Total travel time may exceed 3 hours depending on connections.

• Taxi/Rideshare

  If you prefer a more direct route, consider using a taxi or rideshare service (such as Uber or Lyft) from your location in Redwood National and State Parks. This option provides door-to-door service but can be more expensive, typically ranging from $50 to $100 depending on traffic and time of day. Ensure to confirm your pickup location and provide the destination: 5175 Somersville Rd, Antioch, CA 94509.