$7; $6 (ages 55+ and active and retired military with ID); free (ages 0-12 months). Phone ahead to confirm rates.
Tues.-Sat. 10-5, Sun. 1-5, Sept.-May; Mon.-Sat. 10-5, Sun. 1-5, rest of year. Closed late Aug. to mid-Sept. for annual maintenance; phone ahead. Closed Jan. 1, Easter, Memorial Day, July 4, Thanksgiving, Christmas Eve, Christmas and day after Christmas.