The Île aux Tourtes Bridge is a bridge on the western tip of the Island of Montreal, spanning Lake of Two Mountains between Senneville, and Vaudreuil-Dorion, Quebec, Canada. It carries 6 lanes of Autoroute 40 and is the main transportation link between Montreal and the province of Ontario. At 2 km in length, it is the longest bridge in Quebec to cross a body of water other than the Saint Lawrence River. It is also commonly known by Montreal's English community as the Lake of Two Mountains bridge.