The brisk blue waters of Round Valley Reservoir attract swimmers, boaters, fishermen, picnickers and campers to its scenic shore. The reservoir covers over 2,000 acres and is approximately 180 feet deep, the deepest lake in New Jersey. Round Valley is one of the few parks that offers wilderness camping. The campsites on the eastern side of the reservoir are accessible only by hiking or boating. Cross-country skiers and sledding enthusiasts congregate at Round Valley in the winter months.