While the Cathedral Spires trail is relatively easy, do note that the Little Devils Tower trail is moderate to strenuous, depending on your fitness level and the section of the trail.
When you turn off the Cathedral Spires trail and onto Trail #4 (or Little Devils Tower trail), you will begin another windy steep ascent.
At the end of the Little Devils Tower Trail, you will be rewarded with absolutely breathtaking views over the Cathedral Spires, Black Elk Wilderness, backside of Mount Rushmore, and the brick fire-tower standing at 7,242 feet (2,207 meters) at Harney Peak.
If you parked at the Cathedral Spires trail head as we did, head back down the Little Devils Peak trail the same way you climbed up, and drive to Sylvan Lake!