Lac Saint-Louis
| Lac Saint-Louis | |
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| Lac Saint-Louis as seen from Léry | |
| Geographical location | Québec (Canada) |
| Tributaries | Saint Lawrence River |
| Drain | Saint Lawrence River |
| Places on the shore | Sainte-Anne-de-Bellevue , Vaudreuil-Dorion |
| Location close to the shore | Montreal |
| Data | |
| Coordinates | 45 ° 24 ′ N , 73 ° 49 ′ W |
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| Altitude above sea level | 21 m |
| surface | 148 km² |
The Lac Saint-Louis is a 148 km² large lake in the southwest of the Canadian province of Quebec . It is located southwest of Montreal in the area where the Ottawa flows into the St. Lawrence River and belongs to the Hochelaga archipelago .
The lake is bounded by the Île de Montréal to the north and east and by the Île Perrot to the west . To the south lies the city of Beauharnois on the mainland . Two narrow arms of the Ottawa River around the Île Perrot create a connection to the Lac des Deux Montagnes to the north; the slight difference in height is overcome by a lock each .
The lake is popular with sailors . There are several yacht clubs on the north bank. In the lake itself, which forms part of the Saint Lawrence Seaway , are the Île Dorval , Île Dowker and other small islands.