From the trailhead, run 0.2 miles on the Madison Run Fire Road before making a right onto the Furnace Mountain Trail. Cross Madison Run and follow the trail for 1.6 miles until reaching the junction with the Furnace Summit Trail. Turn left on the Furnace Summit Trail and continue for 0.5 miles, passing over the summit and reaching an overlook. Retrace your steps back to the Furnace Mountain Trail and turn left, uphill. In 2.1 miles the Furnace Mountain Trail ends at the intersection of the blue-blazed Trayfoot Mountain Trail. Stay left on the Trayfoot Mountain Trail for 0.6 miles to the intersection of the Blackrock Spur Trail. Bear left towards the Blackrock Summit reaching the white-blazed Appalachian Trail (AT) near the Blackrock Summit. Turn left (north) on the AT and follow for 2.3 miles to the Browns Gap parking area on Skyline Drive.
From Browns Gap descend on the yellow-blazed Madison Run Fire Road. In 0.8 miles turn right onto the yellow-blazed Big Run Spur Trail and climb for 0.3 miles to the intersection with the blue-blazed Rockytop Trail. Turn left on the Rockytop Trail for 0.4 miles to the intersection of the blue-blazed Austin Mountain Trail. Take the Austin Mountain Trail to the left for 3.3 miles, passing through several rock scree fields before descending to the Madison Run Fire Road. Take a right and follow the road 1.0 miles back to your car.