Barely 15 000 years old, the St. Lawrence River is the world's youngest seaway! When out in the middle of the river, you feel you are at sea, and when close to shore, the physical traces of this waterway's birth and evolution can be read on its rocky shoreline. The St. Lawrence originates in the Great Lakes, but the waters from several other rivers that flow into the seaway contribute to its powerful current. Learn about the fascinating natural phenomena that create the magic of the St. Lawrence River.


The St. Lawrence River originates from the Great Lakes. As it flows towards the Atlantic, it increases in size due to the runoff from many streams and rivers in Quebec. The river flows through a variety of landscapes: flatlands and marshes, beaches and sand dunes, rocky shorelines and reefs, each with its own species of plants and animals. Humans have founded cities and villages along the St. Lawrence for millennia. Unfortunately, humans and beautiful natural environments do not always make the best neighbours…

Streams and rivers
Shoals and reefs
Beaches and sand dunes
Flatlands and marshes
Cities and villages
On the Bank of the River, St. Lawrence River