High Quality Content by WIKIPEDIA articles! The Saint John River (French: Fleuve Saint-Jean) is a river, approximately 418 miles (673 km) long, located principally in the Canadian province of New Brunswick but also in, and arising from the province of Quebec and the U.S. state of Maine. It forms part of the Canada – United States border in two different places along its length. The river drains an area of approximately 55,000 square kilometres (21,000 sq mi), of which slightly more than half is located in New Brunswick. Along that portion of the Atlantic shoreline of North America that lies between the St. Lawrence River and the Mississippi River, the Saint John River is the second longest waterway; only the Susquehanna is longer. The lower section of the Saint John River (extending from Fredericton to the City of Saint John) is nicknamed the "Rhine of North America" in reference to its popularity for recreational boating. The head pond of the river is located in Mactaquac, New...