The Saint Lawrence Seaway links the Midwest to the Atlantic Ocean. The Saint Lawrence Seaway flows from Lake Ontario to the Atlantic Ocean.

The United States and Canada joinly built the Saint Lawrence Seaway.

631 km;note;saint Lawrence seaway of 3,769 km including the saint Lawrence river of 3,058 km shared with th united states.

631 km;note;saint Lawrence seaway of 3,769 km including the saint Lawrence river of 3,058 km shared with th united states.

631 km;note;saint Lawrence seaway of 3,769 km including the saint Lawrence river of 3,058 km shared with th united states.

st. Lawrence seaway

st. Lawrence seaway

The St. Lawrence Seaway is the waterway system that improved transportation between the Great Lakes and the Atlantic Ocean.