I mostly ride in Wayne National and then private land that friends have. Also just outside of southern Ohio you can hit the Hatfield and McCoy trails pretty quickly. Not sure where you are, but from Columbus its only about 2 1/2 hours.
If you are looking for tracks there is a nice one in Newcomerstown, do a search on here and a lot of folks have put up a great list.
try this link for a great list: http://dirtrider.net/forums3/showthread.php?t=130193&highlight=ohio