Having ridden down there a few times from Toronto, Canada. We discovered a great road along our way this time in Virginia. HWY 16 from Tazewell VA to Marion VA is about 55km that crosses over 2 mountains. Excellent pavement conditions and virtually no traffic. We ran it twice and only encountered 1 car. That said if you get hurt, could be big problems. Locally it is known as "the back of the dragon" you can google their website. If you are in the area though its a must do.