The St. Lawrence River is a major waterway in North America, flowing from Lake Ontario to the Atlantic Ocean. It serves as a natural border between the United States and Canada, particularly between the provinces of Quebec and Ontario. The river is approximately 1,197 miles long and is vital for trade and transportation, connecting the Great Lakes to the ocean. The St. Lawrence Seaway is a system of locks and channels that allows ships to navigate the river and access the Great Lakes. This seaway plays a crucial role in the economy, facilitating the movement of goods such as grain, iron ore, and coal. The river is also known for its rich biodiversity and scenic beauty, attracting tourists and nature enthusiasts.