This place is full of hikers so it's probably best to stay clear of the main paths. Some parts of pretty steep and you will find plenty of technical patches as you ride through. Trails tend to get more rocky as you climb. I'd definitely advised going with somebody as the decent can be kind of sketchy. Also just getting to the top for the view is worth the trip.
From Burlington, head south on Rt. 116. This will eventually bring you to the town of Bristol. While driving on East st (still Rt. 116) you will take a right onto Mountain St. Exd, then take your first right onto Mountain Terrace. You will see limited parking, so find a spot there, or back in the village.
http://www.singletracks.com/item.php?c=1&i=3654