Lac Saint-Louis Lake

Lac Saint-Louis is a lake on the St. Lawrence River system in southwestern Quebec, Canada, immediately adjacent to the Montreal metropolitan area.

The body of water has long been part of the St. Lawrence waterways used for transport and local industry; municipalities around its shores developed in the 19th and 20th centuries as part of Montreal’s suburban expansion.

Located immediately downstream and southwest of the Island of Montreal in Quebec, the lake is bordered by multiple Montreal-area municipalities and lies within the St. Lawrence valley.

• Recreation: Popular for recreational boating and rowing, with multiple municipal waterfront parks and marinas along its shores.
• Setting: Part of the St. Lawrence River system, located adjacent to the Island of Montreal and several suburban municipalities in southwestern Quebec.

Lac Saint‑Louis is about 20-30 km west of downtown Montreal. From the city, drive or take highways toward Dorval, Lachine and the West Island; multiple parks and marinas provide public access. Public transit connections reach the surrounding suburbs, but a car is more convenient for lakeside exploration.

• If visiting from Montreal, combine a drive along Route 132 with a stop in Lachine to see the historic canal locks.
• For wind sports, head to the lake's western shores where shallows and winds favor windsurfing and kitesurfing.
• Avoid the main shipping lanes if paddling; the lake connects to the Saint Lawrence and can have commercial traffic.