Visitor center free. Guided tour $2; free (ages 0-3).
Daily dawn-dusk. Guided tour first Sat. of the month at 9:30. Children's hike second Sat. of the month at 9:30. Other guided hikes are offered; phone for details. Visitor center open Sat. 10-5, Sun. 1-5. Allow 1 hour, 30 minutes minimum.