Granite State of Mind :-D
Snowmobiling (trails stretch from Mass to Canada)
Cross Country Skiing
Downhill Skiing: Waterville Valley (where Olympic hopefuls train), Attitash, Loon, Mt. Sunapee...
visit a sugar shack where they make Maple Syrup!
Laconia Motorcylce Week
Visit "Moose Alley" to see some Moose
Watch a NASCAR Race @ New Hampshire Motor Speedway in Loudon (buy tickets way in advance!)
Drive to the top of the highest peak in the North East: Mount Washington @ 6,288 ft (home of the world's worst weather)
Take the historic Cog Railway to the top of Mt Washington
Lots of outdoor recreation things to do in White Mountains
Take the ski lift to the top of any ski mountain for 360 deg views
Visti the seacoast: beaches/swimming, seafood, whale watching, boat tours
Hobo Railroad in Laconia
Mt. Washington boat tour of Lake Winnipesaukee
Boating on Winnipesaukee
Drive anywhere in NH for the fall foliage (especially the Kancamangus)
Fall Foliage Festivals
Bring a pumpkin to the Keene Pumpkin Festival and help them break the world record for the most pumpkins (again!). Last year they had just shy of 30,000 pumpkins!!!
There are fifty-four historic wooden covered bridges currently standing in NH
And so much more! :-D