High Cliff State Park is the only state-owned recreational area on Lake Winnebago, Wisconsin's largest lake. High Cliff offers about 16 miles of trails. All trails are looped and vary in length. Visitors are strongly urged to use caution when on steep bluffs that are not protected by a barricade or barrier. A 125-acre area within the 1,187-acre park is designated as a state natural area recognizing its excellent cliff environments, an undisturbed wet-mesic forest, and more than a mile of Lake Winnebago shoreline. The most common mammals observed there are fox and gray squirrels, raccoons, skunks, opossums, deer, woodchucks, 13-striped ground squirrels, chipmunks, mice, shrews, and bats. Present, but rarely seen, are red fox, weasels, and mink. High Cliff is a premier area to watch the warbler migration in the spring. The park is also home to several purple martin colonies. High Cliff State Park offers hiking, biking, camping, boating, canoeing, kayaking, swimming, horseback riding, picnic area, playground, fishing, hunting, trapping, snowshoeing, fat tire biking, snowmobiling, and skiing.