Bull Gap ORV System
The Bull Gap ORV System on the Huron-Manistee National Forests' Mio Ranger District in Oscoda County covers 115 miles of designated OHV trail in the north-central Lower Peninsula, and contains the only designated open-area motorized hill climb on the entire Huron-Manistee National Forest: Bull Gap Hill, a 0.2-mile sand dune face with a 35 to 40 percent average grade that provides the kind of vertical challenge unavailable on conventional trail terrain. The broader 115-mile system spans mixed national forest terrain (hardwood-pine transitions, sandy glacial outwash plain, and the bottomland corridors draining east toward the Rifle River country), with designated routes for ATVs, motorcycles, 4x4 trucks, and side-by-sides on vehicle-class-appropriate segments. Mack Lake Campground sits centrally within the system with 42 sites at $15/night, making multi-day stays practical without commuting from commercial lodging. No day-use fee applies to the national forest land. The system connects north to the Ogemaw Hills ORV Route and St. Helen Motorsport Area and south toward the Au Sable River OHV networks, creating potential for extended multi-day riding itineraries across the north-central Lower Peninsula. Open May 15 through November 30, 6am to 9pm. Contact the Mio Ranger District for trail conditions and current closures (989-826-3252).