Coleman State Park lies on the shore of Little Diamond Pond in Stewartstown, twelve miles east of Colebrook in New Hampshire's remote north country. The excellent trout fishing in Little Diamond Pond and nearby streams makes Coleman an excellent location for fishing enthusiasts. A boat launch is located within the park; small boats are permitted, but speed is restricted. The park is also a good base for fall hunting. Other activities include hiking, canoeing, snowmobiling, and cross country skiing.