Free. Admission is charged for programs and events.
Trails and grounds open Mon.-Fri. 8-8, Sat.-Sun. 9-8, Apr.-Sept.; Mon.-Fri. 8-6, Sat.-Sun. 9-6, rest of year. Trails and grounds closed Christmas. Visitor center open Mon.-Fri. 8-7, Sat. 10-5, Sun. and holidays 1-5, Apr.-Sept.; Mon.-Fri. 8-5, Sat. 10-5, Sun. and holidays 1-5, rest of year. Visitor center closed Thanksgiving and Christmas. Allow 30 minutes minimum.