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
Saint John River (Bay of Fundy) Kennebecasis River. The Saint John River finally discharges into the Bay of Fundy at the industrial city of Saint John. Near the river's mouth is the site of the Reversing Falls, caused by the high tides of the Bay of Fundy. These tides are the highest in the world and cause the river to reverse its flow twice a day in a narrow gorge in the city's centre. The Saint John River has a maximum depth of 50 metres above the Mactaquac Dam. Members of the Wolastoqiyuk Nation, known also as the Maliseet, whose lands and culture have been and