Hours: Farm (includes Peck House, welcome center and observation silo) open Mon.-Sat. 9-5, Sun. noon-5, May-Oct.; Mon.-Fri. 9-5, Sat. 10-5, rest of year. Butterfly house open Mon.-Sat. 9-5, Sun. noon-5, Memorial Day weekend to mid-Sept. (weather permitting). Grounds and trails open daily 6 a.m.-10 p.m. Hawks Hollow daily dawn-dusk. Buildings closed major holidays. Allow 1 hour, 30 minutes minimum.