The English River is a river in Kenora District and Thunder Bay District in Northwestern Ontario, Canada. It flows through Lac Seul to join the Winnipeg River at Tetu Lake as a right tributary. The river is in the Hudson Bay drainage basin, is 615 kilometres long and has a drainage basin of 52,300 square kilometres. Although there are several hydroelectric pl…The English River is a river in Kenora District and Thunder Bay District in Northwestern Ontario, Canada. It flows through Lac Seul to join the Winnipeg River at Tetu Lake as a right tributary. The river is in the Hudson Bay drainage basin, is 615 kilometres long and has a drainage basin of 52,300 square kilometres. Although there are several hydroelectric plants on this river, the English River upstream of Minnitaki Lake is notable as one of the few large river systems in northwestern Ontario with a natural flow and without any upstream source of pollution. It is the fourth longest river entirely in Ontario.