Park headquarters near Fritch is open daily 9-4. Phone ahead to confirm hours and holiday closures. Flint quarries can be visited only on a 1-mile ranger-guided walking tour offered daily at 10 and 2; reservations are required. Grounds closed Jan. 1, Thanksgiving and Christmas. Free. For more information, phone (806) 857-3151 Mon.-Fri., or (806) 857-6680 Sat.-Sun.