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
Lordship of Champlain Lordship of Champlain The Lordship of Champlain was granted in 1664, on the north side of the St. Lawrence River between Trois-Rivières and Quebec City, under the feudal system of New France. Today, the territory of the former manor of Champlain is located in the administrative region of Mauricie in Quebec, Canada. The capital was the town of Champlain. The Lordship of Champlain stretched from the north shore of the St. Lawrence River (west of the mouth of the Champlain River) up towards the north, parallel to the Lordship of Batiscan on the east side. The north-south dividing line between