Lake Champlain level. Lake Champlain is in the Lake Champlain Valley between the Green Mountains of Vermont and the Adirondack Mountains of New York, drained northward by the -long Richelieu River into the St. Lawrence River at Sorel-Tracy, Quebec, northeast and downstream of Montreal, Quebec. It also receives the waters from the -long Lake George, so its basin collects waters from the northwestern slopes of the Green Mountains and the northernmost eastern peaks of the Adirondack Mountains. Lake Champlain drains nearly half of Vermont, and approximately 250,000 people get their drinking water from the lake. The lake is fed in Vermont by
Lake George (New York) Mountain in the southern quarter of the lake. The northern end of the lake that is located near Ticonderoga is considered the southern end of the Champlain Valley, which includes Lake Champlain, as well as the cities Plattsburgh, New York and Burlington, Vermont. There are six known invasive species in Lake George. The Asian clam first found in 2010 is the biggest threat, along with the Eurasian watermilfoil. Other invasive species are the Chinese mystery snail, curly-leaf pondweed, spiny water flea, and zebra mussel. The lake was originally named the "Andia-ta-roc-te" by local Native Americans. James Fenimore Cooper in his