Unless you live in VT and have a VT registration, to my knowledge there isn't any other states NH is reciprocal with. So you have to have a NH registration. Also, park information is here: The New Hampshire Division of Parks and Recreation : Jericho Mountain State Park

 

Here's a list of places you can get a registration in NH: NH OHRV Agents

You have to show them your driver's license and will need the VIN, make, model, year, and how many cc's the engine is.

 

you have to have NH registration for sure no fee if you don't go up into the welcome center entrance[beach erea] can enter park through Gorham side or from Jericho motorsports parking erea

 

Jerico motorsports sells the NH reg.They are located across from the park. I paid $83 per machine out of state owner it is good 1 year from purchase. Money well spent because they reinvest it in their trail system. We stay at the royalty and it is very nice.