Montreal, Quebec sits between the Prairies River and the St. Lawrence River

iss073e0866294 (Oct. 8, 2025) --- Montreal, Quebec, the second-most populous Canadian city with a metropolitan population of about 4.29 million, sits between the Prairies River to its north and the St. Lawrence River to the south. Montreal is named after Mount Royal, a prominent and natural landmark in the heart of the city. Montréal-Pierre Elliott Trudeau International Airport, voted North America's cleanest airport in 2025, is pictured near the bank of the St. Lawrence from the International Space Station as it orbited 263 miles above the Earth.