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 would receive support from the Canadians upon their arrival at Quebec. This was not the case, and the rebel army struggled to take Quebec with diminishing supplies, support, and harsh northern winter weather. The Continental Army was forced to camp outside Quebec’s walls for the winter, with reinforcements from New York, Pennsylvania, Massachusetts, New Hampshire, and Connecticut allowing the soldiers to maintain their siege of the city. The reinforcements traveled hundreds of miles up the frozen Lake Champlain and St. Lawrence River, but were too late and too few to influence a successful siege of Quebec. In May 1776, with