Kevin,

You could come down 77 to 460, take 460 over to 81. 460 is a four lane divided most of the way and would save time over 77 to 81 if you are thinking about going through Roanoke.

The most direct way would be 77 to 81, then 74 down to 58, and 58 to the track. I've driven a lot through those roads and 58 is managable. it gets a bit hilly and curvy around Stuart VA but it isn't bad.

Ron