Park grounds open daily 8-8, early May-Labor Day; 8-7, day after Labor Day-early Oct. and late Mar.-early May; 8-6, early Oct.-early Nov. and late Feb.-late Mar.; 8-5, rest of year. Tour road closes 30 minutes before park closing. Visitor center open Wed.-Sun. 9:30-5. Closed Jan. 1, Thanksgiving and Christmas. Allow 1 hour minimum.