you must look at a map first ):
The Gulf of Saint Lawrence.
The Saint Lawrence River flows northeastward from the eastern end of Lake Ontario to the Gulf of Saint Lawrence. The first stretch of the river forms the border between Ontario (Canada) and New York State (USA); the rest of the river lies in Québec.
The United States and Canada joinly built the Saint Lawrence Seaway.
The Saint Lawrence River is in Canada but near the border of the US with the state of Maine.
Gulf of Saint Lawrence Canada.
Canada
Québec City is located in the province of Québec, in Canada. It is situated along the Saint Lawrence River in the eastern part of the province.
SouthWest
What saint Lawrence river forms a boundary between the Canadian province of
The Saint Lawrence Seaway
The Saint Lawrence River in Canada
The Saint Lawrence River forms the boundary between Ontario, Canada, and New York State.