Its not in Chattanooga its near South Pittsburgh, TN. From the rumors that I have heard its closed unless you know the "Damn Locals" that ride there, Damn Locals is the name of the local club in that area. The way I heard the story, a good chunk of the land is owned by a developer and someone burned down a bulldozer that was on the property. The developer supposedly will have anyone caught on the land without permission arrested.
The sad part is the trails there are really great for all levels of rider. The scenery is really nice and this was one of my wifes favorite areas to ride when we first got to Huntsville.
Damn Locals contact one of the club members