The major river flowing through Canada is the St. Lawrence River. This vital waterway connects the Great Lakes to the Atlantic Ocean, playing a significant role in transportation and trade. The river is bordered by several major cities, including Montreal and Quebec City. It features diverse ecosystems along its banks, supporting various species of wildlife and plants. The St. Lawrence also serves as a major route for shipping and tourism, making it essential for Canada’s economy. Its historical significance dates back to the early explorations by Europeans in North America.