Trail is 12 miles of singletrack and forest roads. The route is marked by white blazes as well as brown arrows at some intersections. If you follow the arrows and take the recommended route, the first 7 miles are mostly uphill, followed by some fast descents for the last 5 miles. There is one extended section of bone jarring descending and one extended section of extremely smooth descent. Trail is appropriate for beginners and intermediate riders. Trail is not very technical and not too steep. Very good workout and great scenery. Campsites are available for a small fee from the park headquarters. There are no user fees for the trail. Trail is fairly isolated and I saw no other riders (on a Saturday). However, the trail crisscrosses with many fire roads and offers several \"bail outs\" along the way if you break down or get tired. I would recommend getting a map but it is not necessary. The only downside was the existence of several un-rideable obstacles directly on the trail. All in all, a great trail and well worth the trip.
West on I-70 past Hagerstown to I-68 west. Take exit 64 and follow the signs to forest headquarters. Trail is approximately 2 - 2.5 hours from Baltimore, MD.
http://www.singletracks.com/item.php?c=1&i=2298