Wolf Den Run State Park is Maryland's first and currently only park that caters to four-wheeling. There are three designated areas, each with numerous trails. A permit is required. The trails are open year-round except for deer firearms season, the two weeks beginning the first Saturday after Thanksgiving. There is no camping at any of the three offroad locations, but a campground is 1 mile northwest of Huckleberry Roaks Area along N Hill Road.
Trail 2201 is part of the Potomac River Area and is a loop at the highest point of the PRA. There are a lot of puddles of different depths. Be careful because there is a very real risk of getting stuck in the deep ones. This was where the miners dumped a lot of the slag. The smell of sulfur is pretty strong. At one point on the trail, you pass an area called the "slag pile," which is a good place to practice on pretty steep slopes. In areas the trail is narrow so watch for pinstripes.