Saint Croix River
river, North America
Saint Croix River, river that rises as an outlet of the Chiputneticook Lakes, Maine, U.S., and flows south-southeast into Passamaquoddy Bay, an inlet of the Bay of Fundy; its entire 75-mile (121-km) length forms the international boundary between Maine and New Brunswick, Can. Navigation upriver is possible for only 10 miles (16 km) because of power dams at Calais-Milltown. The river, once important economically for lumbering, is now used for recreation. Given its name by...