Connecting People with Nature Bernheim Arboretum and Research Forest is a privately funded 14,600 acre forest in Clermont, KY. We feature 35 miles of hiking trails, a fishing lake, bike trails, a LEED Platinum certified Visitor Center and many other beautiful ways to connect with nature. We are open daily 7:00 a.m. to 1 hour prior to sunset. Closed January 1 and December 25.