Champlain Valley southward into the Valley of Vermont. The Vermont Lowlands are primarily underlain by sedimentary rocks, especially limestone and shale, though metamorphic rocks such as marble and slate are also present. Lake Champlain is situated in the Champlain Valley between the Green Mountains of Vermont and the Adirondack Mountains of New York, drained northward by the Richelieu River into the St. Lawrence River at Sorel-Tracy, Quebec (northeast of Montreal). Major tributaries of Lake Champlain include Otter Creek and the Winooski, Missisquoi, and Lamoille rivers in Vermont, and the Ausable, Chazy, Boquet, and Saranac rivers in New York. Lake Champlain also receives
Champlain, New York States border at Champlain and travels south to Albany, connecting to the New York State Thruway. U.S. Route 9 parallels I-87, and U.S. Route 11 runs east-west across the town. U.S. Route 2 intersects US-11 by Rouses Point. New York State Route 9B intersects US-11 in the northeast and US-9 in the southern part of Champlain, providing a highway closer to Lake Champlain. New York State Route 276 partly runs along the international border. As of the 2000 census, there were 5,791 people, 2,386 households, and 1,562 families residing in the town. The population density was 113.1 people per square