Be careful during hunting seasons.
A better rocky technical singletrack descent does not exist!
Enter at Brush Creek access (ample parking here), ride doubletrack for a few miles, then ascend wide, very rocky, steep singletrack. Turn left at top of first climb onto dirt road, which turns into doubletrack (Tuscarora trail) and climbs some more. At the top is series of nice rock gardens and a great view.
Begin descending after shelter area. This part contains some of the best technical singletrack that you'll find anywhere, with rock steps, drops, and switchbacks. Toward the bottom is a fast roller-coaster stretch that ends at a creek crossing. Then more wide/doubletrack. There is some barbed wire across the trail at one point here, ride around to the right and then left again to rejoin trail. On the final ascent there is a choice of dirt road or singletrack. Just ride up the dirt road for a few hundred yards and then go left into the woods anywhere you want and you'll find the singletrack 30-50 feet in. This leads you right back to the parking area.