The Mt. Holly Sanctuary is owned by the Nature Conservancy. Many examples of the local ecosystems exist in the 221 acres. The western portion is dominated by a north south ridge. At the base of the ridge lies a wetland area which includes a red maple swamp and a pond reverting to marshland. Much of the terrain is steep and rugged with several outcrops of Fordham gneiss. There are bridle trails as well as walking trails well marked throughout the sanctuary. A trail box, located by the main entrance off Mt. Holly Road, contains a guest register and maps detailing color coded trail systems.
At the intersection of rt. 121 N and rt. 35, turn onto rt. 121N. Follow rt. 121 and turn left onto Todd Road. Turn left onto Mount Holly Road. The park entrance is up the hill on your right.