The longest maintained loop trail in Badlands National Park is the Castle Trail which stretches 5.4 miles along the north edge of the Badland Wall. The Castle Trail is a flat hike with spectacular views. Expect some difficulty managing this moderate trail as you weave through a combination of spires, buttes, and sod tables interspersed with open prairie. Be prepared for the weather and bring lots of water. If it;s raining, the trail can be extremely slippery. Various numbered metal posts mark the landscape which provide a valuable guide as you trek over this terrain. The Castle Trail can be accessed from its east or west terminals, connecting to Badlands Loop Road.