Ive been riding for 6 months now and have never been to a trail. what good trails are in New York, New Jersey and Pennsylvania.  

There are not many places in NY unless you go to the Tug hill region or to Jefferson Lewis county area or join a club that has a ridding area you can check out our club at www.ncatva.com.  I'm not to sure on PA but here are a few places that I have heard of
http://www.ridelosttrails.com
http://www.majestictrails.com