Route 133 is a historic and heritage road of the Montérégie region in the province of Quebec, with north/south orientation and located on the eastern shore of the Richelieu River. Its northern terminus is in Sorel-Tracy, on the south shore of the Saint Lawrence River. The southern terminus is in Saint-Armand at the United States border with Vermont, close to Highgate Springs, where it continues southward past the Highgate Springs-St. Armand/Philipsburg Border Crossing as Interstate 89.