The entire Mickelson Trail is 109 miles long and has a total of 15 trailheads, 4 rock tunnels, and several railroad bridges. This part of the trail is accessed at Harbach Centennial Park in Custer, where you'll then journey northward along Laughing Water Creek and near the Black Elk Wilderness. There are great views of Crazy Horse Mountain and also the granite spires around Buckhorn Mountain. You can make this a half-day one way trip with necessary vehicle arrangements, or it can be done as a full-day out and back trip. Be sure to purchase a Mickelson Trail pass at a self-service station along the trail or online.