Near 2410 Flint Hill Road, Troy, NC. Click here for directions from the beginning of Ophir Road on NC 109 to the Jumping Off Rock/Dark Mountain Trailhead. When coming from NC 109, the trailhead will be on the right side of Flint Hill Road. Jumping Off Rock Trailhead (also known as Dark Mountain Trailhead) is the northernmost trailhead for the Uwharrie Trail, and overlooks Barnes Creek. There is off-road parking available at the trailhead.