CHURCHILL (Missinnippi or English), the name of a river of the province of Saskatchewan and district of Keewatin, Can ada. It rises in La Loche (or Methy) lake, a small lake in 56° 3o' N. and 109° 3o' W., at an altitude of 1,577ft. above the sea, and flows east-north-east to Hudson's Bay, passing through a number of lake expansions. Its principal tributaries are the Beaver (35om. long), Sandy and Reindeer rivers. Between Frog and Methy portages (48om.) it formed part of the old voyageur route to the Peace, Athabasca and Mackenzie. It is still navigated by canoes, but has many rapids. The Churchill is 925m. long. Ft. Churchill, at its mouth, is the best harbour in the southern portion of Hud son's Bay. It is to be the terminus of the Hudson's Bay railway, and not Port Nelson as originally planned. The river has enor mous undeveloped water powers.