Harriman State Park, just one hour north of Manhattan, is New York’s second-largest park and a welcome reprieve from city life. Inside this vast 47,500-acre park you'll find over 200 miles of hiking trails, beautiful vistas, and 31 lakes, the largest of which is over 300 acres. Harriman State Park makes up a much larger complex of protected land; the 5,200-acre Bear Mountain State Park borders the northeastern side, and 21,000-acre Sterling Forest borders the southwest. The park is so large that it splits two counties. If you're arriving from the north, try searching for an RV in Orange County. Otherwise, rent an RV in Rockland County.