Map 4-Mile State Forest Trail Camp 4216 Ranger Road, Hartwick Pines State Park, Grayling, MI 49738 Add To Trip WebsitePhone: (989) 348-7068 Description Group area designed for use by equestrian campers riding the Shore to Shore Riding/Hiking Trail. Non-equestrian campers are also welcome. Maximum capacity is for 200 individuals and can accommodate tents and small trailers. Videos TripAdvisor® Traveler Reviews More To Explore Categories: Outdoors Campgrounds & RV Parks Equestrian Hiking Paddle Sports Fishing Attractions Lodging Recreation City: Grayling Region: Northeast Although the MEDC uses reasonable efforts to maintain the accuracy of the website content, it is not represented to be error free. Read legal information.