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St. Lawrence River

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Landmark
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St. Lawrence River (Canada)

Weather…

The St. Lawrence River is one of the most significant waterways in North America, acting as the primary outflow for the Great Lakes into the Atlantic Ocean. Spanning approximately 1,197 kilometers, it connects the industrial heartland of the continent to global maritime trade routes. Historically, the river served as the gateway for French exploration and settlement, with Jacques Cartier navigating its waters as early as 1535. The river begins at the eastern end of Lake Ontario and flows northeast through the scenic Thousand Islands region before widening into the massive Gulf of St. Lawrence. A monumental feat of 20th-century engineering, the St. Lawrence Seaway, opened in 1954, consists of a sophisticated system of locks and canals that allows deep-draft ocean vessels to travel all the way to inland ports like Chicago and Duluth. The river's ecosystem is remarkably diverse; at the confluence of the Saguenay River, the mixing of cold saltwater and nutrient-rich freshwater creates a unique environment that supports a high concentration of marine mammals. This area is a critical habitat for the endangered St. Lawrence beluga whale and a world-renowned location for whale watching. Economically vital for shipping grain, ore, and manufactured goods, the river also faces environmental challenges such as invasive species and pollution management. Culturally, the St. Lawrence remains the soul of the province of Quebec, with its banks hosting historic cities that have relied on the river's resources and navigation for centuries.

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

JanFebMarAprMayJunJulAugSepOctNovDec
Avg °C-12-11-629141817136-1-8
Rain mm56596479881049695921038285

📋 Practical info

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Visiting
The St. Lawrence River is a freely accessible natural landmark visitable year-round. Particularly beautiful are boat tours and walks along the riverfront promenades.
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Typical hours
The river itself is accessible around the clock. Boat rentals and tour operators typically operate seasonally from May to October.
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Photography
Photography is permitted along the entire riverbank. Excellent panoramic shots can be taken from viewpoints like Mont-Royal.
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Time needed
Allow at least half a day for a boat trip or drive along the river. Two days are recommended for a thorough exploration from Montreal to Quebec City.
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Combine with
Combine the river visit with a trip to Old Quebec or Mont-Tremblant National Park. Île d'Orléans is also worth a day trip.
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Getting there
The St. Lawrence River is best accessed by car or RV along Route 138 or 20. Major cities offer train and bus connections.
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Insider tip
Drive early in the morning to capture mist over the river. Try local seafood at a waterfront harbour restaurant.

History & landmarks

1535

Geography

Length
1197 km
Coordinates
48.06520, -69.64550

Facts

  • Length: 1,197 km
  • Basin Area: 1.3 million km2
  • European Discovery: 1535 (Cartier)
  • Seaway Opened: 1954
  • Fish Species: 83
  • Outflow: Gulf of St. Lawrence

Explore nearby

Notable places around

TadoussacTadoussac9 km · SExplore →
Les BergeronnesLes Bergeronnes13 km · NEExplore →
L'Isle-VerteL'Isle-Verte34 km · NExplore →
La MalbaieLa Malbaie58 km · SExplore →
ForestvilleForestville67 km · NEExplore →
Baie-Saint-PaulBaie-Saint-Paul98 km · SExplore →
Grosse Île and the Irish MemorialGrosse Île and the Irish Memorial101 km · SWExplore →
Petite-Rivière-Saint-FrançoisPetite-Rivière-Saint-François107 km · SExplore →

Route planner — Car & Motorhome

Where do you start? We build the route here, with stops and country notes along the way.

Vehicle
Only stops with (optional):

© OpenStreetMap contributors · OpenRouteService

Sights in the town St. Lawrence River (1)

Saguenay-St. Lawrence Marine Park📍 landmark

Saguenay, St. Lawrence Marine Park protects a section of the St. Lawrence River and the Saguenay Fjord.

Sights nearby

Frequently asked questions

Which cities are located on the St. Lawrence River?
Montreal and Quebec City are the most significant cities on its banks.
What is the Thousand Islands National Park?
An archipelago in the river famous for boat tours and scenic castles.
Can you watch whales in the river?
Yes, especially near Tadoussac where the Saguenay Fjord meets the river, home to belugas and blue whales.
How important is the river for trade?
The St. Lawrence Seaway is a vital route for ocean-going vessels to reach the Great Lakes.
Are there beaches on the St. Lawrence River?
Yes, there are several sandy beaches and national parks along the river, especially in Ontario and Quebec.
St. Lawrence River: where is it located?
St. Lawrence River is located in Canada.
St. Lawrence River: when is the best time to visit?
The most pleasant time to visit is Jun, Aug.
View on map → The Top 50 Attractions → OpenStreetMap →
North America
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History & landmarks

Quebec City — St. Lawrence River (Canada)
Quebec City
Capital of Quebec
Fredericton — St. Lawrence River (Canada)
Fredericton
Capital of New Brunswick
Montreal — St. Lawrence River (Canada)
Montreal
Major city in Quebec
Bay of Fundy — St. Lawrence River (Canada)
Bay of Fundy
Known for high tides
Hopewell Rocks — St. Lawrence River (Canada)
Hopewell Rocks
Known for its unusual rock formations shaped by tidal erosion.
Iqaluit — St. Lawrence River (Canada)
Iqaluit
Capital of Nunavut
Peggy's Cove Lighthouse — St. Lawrence River (Canada)
Peggy's Cove Lighthouse
An iconic lighthouse on the coast of Nova Scotia.
Ottawa — St. Lawrence River (Canada)
Ottawa
Capital of Canada

More places

Plains of Abraham — St. Lawrence River (Canada)
Plains of Abraham
Site of a pivotal battle between the French and British.
Quebec Maple Syrup — St. Lawrence River (Canada)
Quebec Maple Syrup
The world's leading producer of authentic maple syrup.
Rideau Canal — St. Lawrence River (Canada)
Rideau Canal
Historic waterway connecting Ottawa and Kingston.
Port of Halifax — St. Lawrence River (Canada)
Port of Halifax
Strategically important deep-water port on the Atlantic.
Baffin Island — St. Lawrence River (Canada)
Baffin Island
Canada's largest island, located in the Arctic.
Algonquin Provincial Park — St. Lawrence River (Canada)
Algonquin Provincial Park
Ontario's oldest provincial park, featuring dense forests.
Fortress of Louisbourg — St. Lawrence River (Canada)
Fortress of Louisbourg
18th-century French fortress on Cape Breton Island.
Toronto Financial District — St. Lawrence River (Canada)
Toronto Financial District
The economic heart of Canada.