The West Side Line, also called the West Side Freight Line, is a railroad line on the west side of the New York City borough of Manhattan. North of Penn Station, from 34th Street, the line is used by Amtrak passenger service heading north via Albany to Toronto; Montreal; Niagara Falls; Rutland, Vermont; and Chicago. South of Penn Station, a 1.45-mile (2.33 km) elevated section of the line abandoned since 1980 (popularly known as the High Line) has been transformed into an elevated park. The south section of the park from Gansevoort Street to 20th Street opened in 2009 and the second section up to 30th Street opened in 2011.
The West Side Line was built by the Hudson River Railroad, which completed the forty miles (64 km) to Peekskill on 29 September 1849, opened to Poughkeepsie by the end of that year, and extended to Albany in 1851. The city terminus was at the junction of Chambers and Hudson Streets; the track was laid along Hudson, Canal, and West Streets, to Tenth Avenue, which it followed to the upper city station at 34th Street. Over this part of the right-of-way, the rails were laid at grade along the streets, and since by the corporation regulations locomotives were not allowed, the cars were drawn by a dummy engine, which, according to an 1851 description, consumed its own smoke. While passing through the city the train of cars was preceded by a man on horseback known as a "West Side cowboy" or "Tenth Avenue cowboy" who gave notice of its approach by blowing a horn.