Free. Reservations are required 1 to 2 weeks in advance for guided tours. Reservations are not required for self-guiding tours.
Guided tours are given Wed.-Fri. and Sun. at 10 and 2. Self-guiding tours are offered Sat.; shuttles depart from The Museum of the San Ramon Valley, 205 Railroad Ave., at 10:15, 12:15 and 2:15. Closed Jan. 1, Thanksgiving and Christmas. Allow 2 hours, 30 minutes minimum.