Grounds and visitor center free. Tram tour by donation.
Grounds daily dawn-dusk. Visitor center Fri.-Wed. 9-4:30. Tram tours are given Sat.-Sun. at 11:30 and 1, mid-Mar. to mid-Nov. (also Mon.-Wed. and Fri. at 11:30 and 1, mid-June to late Aug.) (weather permitting). Closed federal holidays. Phone ahead to confirm schedule. Allow 2 hours minimum.