Park admission $6 (nonresidents per private vehicle); $4 (nonresidents arriving by other means); free (Montana residents with ID). Two-hour, 2-mile guided cavern tour $12; $5 (ages 6-11).
Park open daily 9-9, mid-June. to mid-Aug.; 9-5, rest of year. Cavern tours are given daily 9-6:30, mid-June to mid-Aug.; 9-4:30, May 1 to mid-June and mid-Aug. through Sept. 30. Candlelight cave tours are offered are offered in late December; reservations are required.