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Beauharnois, Quebec

Beauharnois is a town located in the Montérégie region of Quebec, on the south shore of the St Lawrence and Lac Saint-François. Beauharnois lies just off the AutoRoute 30 Montreal South Bypass. Its history is closely tied to of the region’s development and the role of the St. Lawrence River for industry and trade. The historical significance of the canal and the hydroelectric station are reflected in the town’s heritage.

Beauharnois History

The area around Beauharnois was initially inhabited by Indigenous peoples, including the Mohawk and Algonquin, who lives closely with the St. Lawrence River.

During the 1600s, French explorers and settlers arrived in the region. The French colonial authorities granted seigneuries (feudal land grants), and one such seigneury, the Seigneury of Beauharnois, was established in 1702. It was named after Charles de Beauharnois, who was the governor of New France at the time. You can recognize land grants from that era by long narrow strips of land (farms) running perpendicularly from the river, typically separated by hedgerows or tree windbreaks.

Additionally, the development of the Beauharnois Canal in 1843 kickstarted the area’s industrialization.

The hydroelectric potential of the St. Lawrence River was recognized in the 1900s to take advantage of the drop in the St Lawrence to the west. The Beauharnois Hydroelectric Power Station, which began operation in the 1930s, was a major project that harnessed the power of the river for electricity generation and combined with an improved Beauharnois Canal completed at the same time.

During World War II, the hydroelectric power generated here was crucial for wartime production of aluminum, a strategic material for the airplane industry.

After the war, Beauharnois continued to experience economic growth and diversification. Beauharnois has agricultural development, industrialization, and important hydroelectric projects.

Beauharnois Attractions

 Îles de la Paix National Wildlife Area
Maple Grove, Léry, QC

Offshore in the St Lawrence River at Beauharnois

Lake island wildlife area & bird nesting site spanning 319-acres with wetlands & beaches.  Îles de la Paix National Wildlife Area (NWA) is a chain of islands, stretching over several kilometers (km) in the middle of Lake Saint-Louis, a natural widening of the St. Lawrence River in Québec. This NWA protects weed beds that are important waterfowl breeding habitats and staging areas for migratory birds.

Old Beauharnois Canal

310, rue Victoria, Salaberry-de-Valleyfield, QCmJ6T 1B3

Advantageously located in the heart of downtown Salaberry-de-Valleyfield leading to Lac Saint-François, the Old Beauharnois Canal is positioned as an essential meeting place for boaters in Quebec and a place of entertainment and unique contemplation for land visitors. A designated Heritage property since 2012, there is 280 meters of promenade along the shore with several visitor services

Écluse Beauharnois (Beauharnois Lock)

Beauharnois, Quebec J0S 1J0

Part of the Saint Lawrence Seaway, the Beauharnois Lock is an impressive structure that allows ships to navigate between Lake St. Louis and Lake Saint-François.

Parc Saint-Louis


A local park where residents and visitors can enjoy green spaces, walking trails, and outdoor activities.

Parc Delpha-Sauvé

209 Rue Sainte-Cécile, Salaberry-de-Valleyfield, QC J6T 1M4
(450) 370-4390

A public park with playgrounds, sports facilities, and walking paths. It’s a popular spot for outdoor activities and family recreation. You can play tennis on its four courts or take advantage of its outdoor aquatic complex with the largest heated outdoor swimming pool in the region, eight training lanes, an active river, and a slide. There is also a baseball field, a recreational kayak and SUP rental kiosk and, during the winter, a sliding area made up of four lanes.

Centre Nautique de Beauharnois

214, boulevard Maple Grove, Beauharnois, J6N 1L3
450 540-1134

The Beauharnois nautical centre is a 140-vessel marina with a dock and boat ramp, a fishing tackle shop and a rental centre with rowboats, kayaks, pedal boats, and personal watercrafts. We also offer fishing excursions and houseboat lodgings.

Bois Robert et parc des Chutes Saint-Louis

Access from Rue Mill, off Route 132

Location of an 1858 woolen mill at the water’s edge, and a protected park since 1997. More than 10 km of trails are accessible to practice different activities. In winter, snowshoe and cross-country ski trails are available

Beauharnois, Quebec Area Map