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
Champlain and St. Lawrence Railroad line. The line was extended south along the Richelieu River valley in 1851 to Rouses Point, New York and the following year saw a more direct routing built from the St. John-Laprairie line to St. Lambert, directly opposite Montreal to avoid the indirect journey up and down the St. Lawrence River from Laprairie. This latter line effectively reduced the line into Laprairie to branch line status and it would be later abandoned. The C&SL merged with the Montreal and New York Railroad in 1857, formerly known as the Montreal and Lachine Railroad, with the new company being named the Montreal