$7 (New Jersey residents $5), Sat.-Sun. and holidays, Memorial Day-Labor Day.
Park open daily 8-8, in summer; 8-6, in fall and spring; 8-4:30, in winter. Visitor center open daily 9-4. Nature center open Wed.-Sat. 9-4, Sun. noon-4. Nelson House open Sat.-Sun. 11-6, in summer; otherwise varies. Observatory open during special programs.