Washington County, New York is part of the Great Appalachian Valley (also known simply as the 'Great Valley') which is a long narrow valley strip often between tall mountain ranges. The county transitions from the Taconic Mountains to the Adirondack Mountains, and from the Lake Champlain Valley to Hudson River Valley. Much of the county is part of the slate valley of the Upper Taconic Mountains (Taghkanic, meaning 'in the trees'). The eastern boundary of Washington County is the New York–Vermont border, part of which is Lake Champlain. This is also the border with New England proper. The northern end of the county is
Lake Champlain Bridge (2011) Lake Champlain Bridge (2011) The Lake Champlain Bridge is a vehicular bridge traversing Lake Champlain between Crown Point, New York and Chimney Point, Vermont. It replaced the Champlain Bridge. The bridge was designed and constructed during an aggressive two-year schedule to minimize the social and economic impact of the original bridge's demolition. It is the only fixed-link crossing of Lake Champlain/Champlain canal between US 4 in Whitehall, to the south and US 2 at Rouses Point, to the north. The main arch span was prefabricated off-site in Port Henry, floated by barge to the already constructed approach spans, and then