Which river forms part of the border between the USA and Canada?
Saint John River (Bay of Fundy) Saint John River (Bay of Fundy) The Saint John River (; Maliseet: "Wolastoq") is a river, approximately long, located principally in the Canadian province of New Brunswick, but also in and arising from three primary sources in the province of Quebec and the U.S. state of Maine. It forms part of the Canada–United States border in two different stretches along its length. The river drains an area of approximately , 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
Red River of the North Forks-East Grand Forks in states of North Dakota and Minnesota, respectively, in the United States and Winnipeg in Canada. The Red is about long, of which about are in the United States and about are in Canada. The river falls on its trip to Lake Winnipeg, where it spreads into the vast deltaic wetland known as Netley Marsh. In the United States, the Red River is sometimes called the Red River of the North. This distinguishes it from the so-called Red River of the South, a tributary of the Atchafalaya River that forms part of the border between Texas, Oklahoma,