Follow the trail along the Interstate until it starts to climb. After 14 switchbacks, go over the top of the ridge. The trail stays on top of the ridge. At the only fork in the trail, take the left side trail. There should be a sign pointing to the Old Fort Picnic area. Once you reach the picnic ground, go to the main road and take the immediate left turn. Go around a white gate 1/8 of a mile up and follow the paved road until you get back to Royal Gorge Rd. again.
The singletrack trail goes from Ridgecrest to the Old Fort Picnic grounds, and through a beautiful section of the Pisgah National Forest. The elevation change is around 2,200 feet. The climb up the 14 switchbacks to the top of Kitsuma is tough, but the downhill off the eastern slopes of the Blue Ridge range is worth the effort. The first downhill section is very steep and rocky. In wet conditions, I hike-a-bike this section.
Next is a section of ups and downs with flats and then around 4 miles of super singletrack downhill. The trail is narrow and there are some serious drop-offs if you leave the trail.
The ride back up the Blue Ridge is along a gated (no cars), overgrown, paved road with beautiful views of the ridge line you just rode down and the Blue Ridge and South Mountains. It is about 5 miles back up, but it is not steep.