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
Lake Champlain Rescue, Law Enforcement and Ice Rescue services 24 hours a day, 365 days a year." Services are also provided by local, and state, and federal governments bordering on the lake, including the U.S. Border Patrol, Royal Canadian Mounted Police, Vermont State Police, New York State Police Marine Detail, and Vermont Fish and Wildlife wardens. Lake Champlain Lake Champlain (French: Lac Champlain) (Abenaki: Pitawbagok) (Mohawk: Kaniatarakwà:ronte) is a natural freshwater lake in North America mainly within the borders of the United States (in the states of Vermont and New York) but partially situated across the Canada–U.S. border, in the Canadian province