This is the road portion of the Skyway Epic race
between Bull Gap (Hwy 148) and Porters Gap (Hwy 77).
Climb "Big Nasty" for two miles to warm up and then when the road tops out get ready for great descents followed by rolling ups and downs. There are multiple line options that change every time I go. Overall, this route requires simple directions just stay in the middle of the mountain ridge and you'll know if you fall left or right...
Look for the views on both sides and be prepared for a long and tough go if you ride this as an out-and-back (~28 miles). With a parking area or a pick up area on both ends, many will complete this route as a shuttle. Fortunately all the pain is forgotten on the "Big Nasty" downhill to the car/beer.