Admission is free. Parking fee is $5 per vehicle on weekends and holidays (Visa/Master Card, cash or check only).
Sat. & Sun.: 10am-4pm
5175 Somersville Road
(Somersville Road exit off Highway 4)
Antioch, CA 94509
The Greathouse Visitor Center is located in Black Diamond Mines Regional Preserve in an underground chamber excavated in the mid-1920s. View the workings of a 20th-century sand mine and learn about the lives of 19th-century coal and 20th-century sand miners. The center contains displays, photographs, and artifacts related to the park’s coal and sand mining eras.
Admission is free. Parking fee is $5 per vehicle on weekends and holidays (Visa/Master Card, cash or check only). Dogs are permitted on leash within the Visitor Center but not on Mine Tours.
For more information, call (510) 544-2750
The Greathouse Visitor Center is located ¼ mile past the upper parking lot along a partially paved, partially gravel trail with some incline. If you would like to request an accommodation to access the Visitor Center, experience exhibits and videos, shop in the gift store, or participate in a mine tour, please call ahead at (510) 544-2750. Please give at least 1-week advanced notice for accommodation requests.
The Greathouse Visitor Center is wheelchair accessible. There are also ADA-accessible restrooms and an accessible water fountain in the upper parking lot.
View programs/events at all visitor centers
Black Diamond Mines Naturalist Programs
Join us for our monthly programs!