The Swift Diamond Riders is one of 25 snowmobile clubs in New Hampshire. Our trails in Stewartstown, NH offer a direct link to the surrounding towns of Colebrook, Pittsburg and Errol. The club operates out of our Warming Hut/Clubhouse, just before Coleman State Park in Stewartstown. Our core group of dedicated volunteers works hard to create one of the best riding experiences in the state! Over 100 miles of scenic trails are maintained, weaving through vast woodlands, along rapid streams and over scenic mountains. There is plenty of wildlife to see along the trails, too, including deer, moose, birds and other critters.