The Adirondack is a daily intercity passenger train operated by Amtrak between New York City and Montreal. The scenic route follows the Empire Corridor through the Hudson Valley with major stops in Yonkers, Poughkeepsie, Albany–Rensselaer, and Schenectady. North of Saratoga Springs the route runs between the Adirondack Mountains and Lake Champlain until crossing the Canada–U.S. border at Rouses Point. Trains take approximately 11 hours to travel the 381-mile (613 km) route.

The Montrealer was an overnight passenger train between Washington, D.C., United States, and Montreal, Quebec, Canada. The train was operated from 1924 to 1966, and again under Amtrak from 1972 to 1995, excepting two years in the 1980s. The train was discontinued in 1995 and replaced by the Vermonter, which provides daytime service as far north as St. Albans, Vermont. Current Amtrak service to Montreal is provided by the daytime Adirondack from New York City via Albany.