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
Champlain (village), New York Champlain (village), New York Champlain is a village in Clinton County, New York, United States. The population was 1,101 at the 2010 census. The village is located in the town of Champlain about west of Lake Champlain and is north of Plattsburgh. The lake and the village were named in honor of Samuel de Champlain, who first surveyed the area in 1609. It was part of Canada until 1763, and became part of the United States in 1783. Champlain was an important staging point in the War of 1812. The village was incorporated in 1873. Champlain village is located in