5175 Somersville Rd
Antioch, California 94509

Hazel-Atlas silica sand mine tours: noon, 1 p.m., 2 p.m., and 3 p.m. Purchase tickets at the Sidney Flat Visitor Center. All Black Diamond programs (unless otherwise noted) meet at the parking lot at the south end of Somersville Road in Antioch. 1 (888) EBPARKS www.ebparks.org

Added by Upcoming Robot on May 26, 2011