Sullivan

Sullivan, county, southwestern New Hampshire, U.S., bounded to the west by Vermont; the Connecticut River constitutes the border. The terrain consists of uplands with several mountain ranges, including the Croydon and Sunapee. The county is drained by the Sugar and Cold rivers; Sunapee Lake lies along the northeastern border. Parklands include Pillsbury State Park and Gile, Hubbard Hill, and Honey Brook state forests. Built in 1866, the Cornish-Windsor Bridge (460 feet [140 metres]) is one...