Any property of Mountain Bike Routes in the Lehigh Valley?

I'm from Delaware and am used to riding the white clay / medium term trail system routes (absolutely amazing If you have not been there). However, I go to a graduate school near Reading, PA, and I have no idea whether there is any GOOD way system far. For good, I mean something heavier than a walk in the woods (perhaps some of the obstacles or technical sections) I found mountainbikepa.com, but give very little information. What I am seeking a personal experience of the trails, for example within an hour's drive from reading (ideally, only half an hour). Thanks in advance!

Try these sites. http://www.trails.com/ http://www.traillink.com/?gclid=CIzJwNKF_pYCFQrFGgodS0wNXw http://www.pedaling.com/ http://www.adventurecycling.org/routes/network . cfm? gclid = CMD3rZeRxJgCFQxKGgodWTf_1A

Bike Ride Lehigh Gorge