The distance from St. Lawrence River to Duluth is approximately 800 miles.
Explanation:
St. Lawrence is a large river in the mid regions of North America and flows in a north east direction. The river connects the Great Lakes to the Atlantic Ocean and also forms the drainage outflow of the Great Lake Basin. Duluth is a city in Minnesota and is essentially a port city. The river flows through the coasts of Duluth and becomes tidal.
