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 Basin Program Lake Champlain Basin Program The Lake Champlain Basin Program (LCBP) is a program to restore and protect Lake Champlain and its surrounding watershed or drainage basin for future generations. The LCBP works in partnership with government agencies from New York, Vermont, and Quebec, private organizations, local communities, and individuals to coordinate and fund efforts which benefit the Lake Champlain Basin’s water quality, fisheries, wetlands, wildlife, recreation, and cultural resources. These efforts are guided by the 1996 lake management plan "Opportunities for Action: An Evolving Plan for the Lake Champlain Basin." In 2003, the plan was updated and signed by the