On County Highway SS, one quarter mile west of County Highway G, the Zillmer Trail Area, located in the Kettle Moraine State Forest-Northern Unit, consists of four loop trails for a total of 11 miles. The south trail head has a heated shelter, vault toilets, picnic tables, grills, and drinking water. Visitors can also access the trail from the Visitor Center. A rustic backpack shelter is reservable for camping along the trail from April through November. In winter, the forest staff regularly machine groom the trails for diagonal and skate skiing (state trail pass required for skiing). Hiking and pets are prohibited when snow is present. Trail usage is best for hiking and cross-country skiing.