The Saint John River is a 673-kilometre-long (418 mi) river flowing within the Dawnland region from headwaters in the Notre Dame Mountains near the Maine-Quebec border through western New Brunswick to the northwest shore of the Bay of Fundy. Eastern Canada’s longest river, its drainage basin is one of the largest on the east coast at about 55,000 square kilometres (21,000 sq mi). This ’River of the Good Wave’ and its tributary drainage basin formed the territorial countries of the Wolastoqiyik and Passamaquoddy First Nations (named Wolastokuk and Peskotomuhkatik, respectively) prior to European colonization, and it remains a cultural centre of the Wabanaki Confederacy to this day.
The Webster–Ashburton Treaty following the Aroostook War established a border between New Brunswick and Maine following 130 km (80 miles) of the river, while a tributary forms 55 km (35 miles) of the border between Quebec and Maine. Maine communities along the river include Fort Kent, Madawaska, and Van Buren. New Brunswick settlements through which it passes include, moving downstream, Edmundston, Fredericton, Oromocto, and Saint John.
It is regulated by hydro-power dams at Mactaquac, Beechwood, and Grand Falls, New Brunswick.
