NH ATV rules?

[Jack in VB]

It looks like there is a trail near me called the Rockingham Recreational Trail that allows atvs. Does anyone know what rules apply? I did a search and it looks like some folks have ridden this on 3 wheelers. I wasn't sure about speed limits, or if there is any registration or anything. Thanks

[brrcuda]

need atv registration for all NH trails to be riding legal. Rockingham is 20 miles of straight trail and all whoops. Derry police patrol it on weekends so don't trespass at the sand dunes you see on the right. Easy pickings for the tickets.

I used to live in NH and have been on most ATV trails at somepoint.