Good luck finding a place. It is illegal to ride on state property. If you are caught they can and probably will confiscate your atv. Having it registered and insured you have a little better chance they wont take it from you but they will give you a hefty fine for trespassing. The only place to ride in NJ is private property with permission of the owner.
There is a SMALL atv/motorcross track in Egg Harbor run by the the Egg Harbor PAL. It costs around $300 a year to join. They are planning a larger park in Millville called Field of Dreams but they are still in the construction stage.
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