The plan is for something close to 50+ miles of trail in the network. This is a stacked loop system with rides available for all skill levels. Excellent views and sweeping new singletrack highlight the ride. It's still a new system, as of May 2007, so I can really describe a "best route". Just say, it's worth the trip if you are within 2-3 hours from Chattanooga. It's a lot like Chicopee Woods in Gainesville, GA, but with MUCH better views.
From Chattanooga, take I-24 W toward Nashville/Birmingham approx 3 mile. Take exit 175 for Browns Ferry Rd toward Lookout Mountain/Mountain View Dr. Turn right at Browns Ferry Rd. Go about 9/10's of a mile and turn left at Elder Mountain Rd. From SORBA - Chattanooga: "Take the TVA Road to the top of the mountain and park in the East Brow Parking Lot on your left. The trail head is marked with a small sign so it may be a little difficult to find your first time out. After parking in the east brow parking lot, get on your bike and ride back out of the parking lot. The trail head is located in the woods directly across TVA road from the east brow parking lot's entrance."
http://www.singletracks.com/item.php?c=1&i=2029