I would check first before going up to Jackman. They're getting into snow this time of year and it's my understanding that once the snow is deep enough to groom ATVs aren't allowed on the trails. Maine Snowmobile Maine Vacation Maine Snowmobiling Trail Conditions Jackman Maine Camps Cabin Rentals Ice fishing Hunting ATV Travel White Water Rafting Maine Fishing Tourism New England Lodging Chamber of Commerce is the Chamber of Commerce's URL. Give them a ring to find out if the trails are closed for the season.

 

Atv trails officially open in may. I believe around the 15th. You can ride earlier but on more discrete areas other then jackman. During the mid season (April & may) the snowmobile clubs don't like to see people on the trail taring up the soft ground. But like I said there is plenty that you can ride during the early spring, just don't get caught . .