New York State Route 9N Much of NY 9N runs alongside either a river or a lake. It follows the Hudson River through northern Saratoga County and southern Warren County, the entirety of Lake George's western shoreline, the west edge of Lake Champlain between Ticonderoga and Westport, and the Ausable River from Keene to Keeseville. The other portions of NY 9N pass through predominantly rural and mountainous regions of the Adirondack Mountains. The NY 9N designation was originally created as part of the 1930 renumbering of state highways in New York to replace New York State Route 9W, a route assigned to an alternate routing
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