Hours: Grounds open daily 7 a.m.-10 p.m., Apr.-Oct.; 7 a.m.-9 p.m., rest of year. Visitor center daily 9-4:30, Apr.-Oct.; Thurs.-Sun. 8-3:30, rest of year. Fisher Cave tours are given daily at 9:30, 11:30, 1 and 3, June-Aug.; Sat.-Sun. at 1 and 3 (also Labor Day at 11:30), mid-May through May 31 and Sept. 1 to mid-Sept. Phone ahead in case of temporary closure due to bat diseases.