Singing Hills serves as an important trail hub for the Millennium Trail, with car and horse trailer parking, and a toilet. Millennium Trail This planned 41-mile regional trail connects neighboring communities and forest preserves as it winds its way through western and northern Lake County. The trail will eventually link to the northern section of the Des Plaines River Trail in Wadsworth. Today, 33 miles of the Millennium Trail are open to hikers, bicyclists and cross-country skiers. Please keep dogs leashed and on trails at all times, and pick up after them. Learn about our Off-Leash Dog Areas (permit required). The trail surface alternates from gravel to paved along various completed sections of the trail. Horseback riding is permitted only along an 11-mile section of gravel trail from Lakewood north to the horse trailer parking area at Singing Hills. From here, the trail surface changes from gravel to paved, and horses are not permitted on the paved section.