Starting in the center of town, the first hill is paved and pretty killer. Once on the trail, its a pretty easy ride. Good aerobic trail, scenic. Gravel base. Total ride is about 20 miles and you end up at the top of the mountain, perfect place for lunch and don't forget the camera. Trail for the most part is a steady climb, but very easy grade, you hardly notice you're climbing. After you leave the top, its downhill, steep, FAST! 18 miles up, 1 mile down. Sweet!
Start in the center of town. Go to the bike shop (I think its something like Blue mountain sports..., not sure now :/ ) trail map is $1. I'd give actual directions but i don't remember any of the street names. However, i would recommend picking up the book of trails for the entire Jim Thorpe area because there are a ton of awesome trails. The book is something like 8 bucks.
http://www.singletracks.com/item.php?c=1&i=1160