Course is no longer used. There were several problems with drivers on the course, had a couple of people hit a couple of different years. The race has moved around a bit since leaving the Sequatchie Valley (that is the one listed as Dunlap, TN). That course was supposedly surveyed several different ways, and was at least very close if not dead on 40k.
That course was incredibly fast. There is as another poster pointed out one very slight rise, other than that, it is basically board flat. There is slight elevation gain to the turn around, so you get to ride "downhill" all the way home, also usually a slight tailwind on the way back (you had to ride into it on the way out, but I never noticed it til the turnaround).
It is really a shame the race can't move back there. but the locals in the area (I ride through that valley a lot) are not very friendly toward cyclists.
It is a beautiful spot, and there is a large century ride there in the fall that is usually timed to coincide with the fall colors, a great ride to check out.
http://www.chattbike.com I live just on the other side of the mountain from that old course, it is basically Chattanooga, TN.
---------------------------------------------------
Disclaimer: This poster is a sales rep in the bicycle industry