Hell Canyon
Hell Canyon is a beautiful 6 mile hike about 13 miles west of the town of Custer on Highway 16. This trail is for hikers, mountain bikers, and horseback riders.
When doing the trail, I recommend starting at the bottom of the cliffs and taking the trail that runs to the north. This follows the creek bed through the canyon for about 2 miles. From there the trail climbs slightly until it reaches the top of the limestone crest. This is the highlight of the trail and it follows the canyon for 2 miles giving your gorgeous views of the canyon and surrounding area. After 4 miles, you begin to descend some, walk through prairie, a little bit of a road, and then continue down through the cliffs back to your car.
This was one of my favorite surprises in the hills, and I felt like I was somewhere in the mountains in Montana or Colorado. There are not many trails in the hills that give you this amazing view for such a long time.