The second Canadian railway line, the Montreal and Lachine Railroad, is opened.

The Montreal and Lachine Railroad was Montreal's first railroad. The railroad was opened on November 19, 1847, with service between Bonaventure Station in Montreal and the St. Lawrence River in Lachine. Built to bypass the Lachine Rapids, it was 12 km long. The railway merged with the Lake St. Louis and Province Railroad in 1850 under the name Montreal and New York Railroad. In 1857, it merged with the Champlain and St. Lawrence Railroad as the Montreal and Champlain Railroad. It would eventually be absorbed by the Grand Trunk Railway.