Saint John

Saint John, east central North America. A total of 673 km (418 mi) long, the river rises in north-western Maine and flows north-east to the border with New Brunswick at St Francis. It then forms part of the United States-Canada boundary before entering New Brunswick and flowing south-east past Fredericton, to the city of Saint John, where it empties into the Bay of Fundy. In New Brunswick the river drives several large hydroelectric plants and drains productive farming regions. The great tidal bore in the Bay of Fundy at high tide creates the Reversing Falls on the river near Saint John, at a point where the height of water of the incoming tidal flow is sufficient even to overcome a series of rapids.