If you go to the website there's a map on the right hand side.
Basically, find Bristol in Tennessee (south east corner), then go south east from that just over the border into North Carolina.

http://www.motorcycleplayground.com/...largescale.htm

There's some good info on the sight - gives you some facts etc about the road etc, etc. Click on the 'roads' link on the left side to see what others are mentioned around there.