WHIPPLE (ROBERT A.) STATE NATURE PRESERVE - 187 ACRES Main Feature: Dolomite cliffs, slump blocks and sinkholes; good spring wildflowers. This preserve contains a narrow wooded ridgetop, pocketed with small, symmetrical sinkholes. The ridgetop and head of the valley is bordered by dolomite cliffs of 10-30 feet in height. There is an abundance of ferns and spring wildflowers throughout the wooded preserve. This area is dedicated in honor of Robert A. Whipple, who generously gave this land to the Division in 1989 for future generations of Ohioans to enjoy. Location: Located in Adams County on the east side of SR 247, approximately 1 mile north of U.S. Route 52. Limited pulloff parking and a 2-mile loop trail are present. Robert A. Whipple State Nature Preserve State Route 247 187 acres. Narrow wooded ridge top, pocketed- with small, symmetrical sinkholes. The ridge top and head of the valley is bordered by dolomite cliffs of 10-30 feet in height. 2 miles of moderate hiking Trails. Located on the east side of SR 247, approximately 1 mile north of U.S. Route 52.