Pearl Hill State Park is a 1,000-acre Massachusetts state park in Townsend, about 50 miles from Boston, adjoining Willard Brook State Forest and managed by the Massachusetts Department of Conservation and Recreation. Used year-round for outdoor recreation, it offers trails for hiking, mountain biking, cross-country skiing, and snowmobiling. A 4-mile trail connects the park to Willard Brook, expanding access through the surrounding woodland. The park also includes campsites, picnic areas, fishing, interpretive programs, and a 5-acre pond with a beach, making it a broad recreational destination in north-central Massachusetts.