I was in the Cloudland Canyon State park just a bit South of Chattanooga a couple of weeks ago for a trail run. There were some well marked trails and lots of them but I didn't get to ride any. I'd say that with the combination of the scenery and the trails, it would be worth checking out. The trails we were on were all blues and were flowy and smooth. Think Bentonville Back 40 style in the trees. There were some double black diamond sections and with the elevation changes and rocks out there, they might be cool. As usual, the ratings are all relative.