WE'RE OPEN! Located in the heart of Illinois' largest concentration of natural lakes, Chain O'Lakes State Park is a water oriented recreation area with outstanding opportunities for boaters, anglers and skiers. The park borders three natural lakes - Grass, Marie and Nippersink - and the Fox River. The park also contains a 44-acre lake within its boundaries. Comprising of over 6,000 acres; the recreational opportunities include two campgrounds with over 230 sites with a youth group area to accommodate 150 youngsters, seven picnic areas and trails for hiking, biking, horseback riding with horse rental and horse-drawn wagon rides are available May-Oct. Hunting, ice fishing and ice skating are offered in the fall and winter months.