The state of New Hampshire is currently developing a 7,200 acre ATV park in Berlin, NH called Jericho Mt. State Park. There are approx 40 miles of trails and when finished will have between 150-200 miles of trails and onsite camping. Berlin is just north of the White Mountains and within an hours drive to Mt. Washington, N. Conway, the Saco River, Story Land and Santa's Village (for the kids), and all the other great things to do in the beautiful White Mountains. I was there last week with my son and had a blast. NH seems to be like NY in that state trails are limited, are mostly supported by local ATV clubs (and they're doing a great job), and we rely alot on private property to ride. Access to the park is free, and Maine and NH honor each others ATV registrations, although there wasn't anybody checking, hint hint. As a matter of fact, there wasn't anybody there at all, we had the whole place to ourselves. I'd recommend checking it out to anybody who's in the area.