Yes I have. I think it is called the South Peddlar Ranger District and it's just northwest of Lynchburg. It's a great place to ride. Mostly fire road type terrain with little to no single track. That's the only down side for me at least. I like it tight. It is still a lot of fun though and has a few technical sections. One is a nice little rocky pipe buster.
It costs $5 a day per vehicle I think and has a gravel parking lot with a loading/unloading dock. About 20 miles of trail total. Beautifal mountain scenery everywhere. The only real downside is two way traffic, so watch yourself on those blind turns. If you know when you are going, hit me back and I will try to meet you up there.