Lake Saint-Louis is a large lake located in the province of Quebec, Canada. It is part of the St. Lawrence River system and is situated near the city of Montreal. The lake covers an area of approximately 80 square kilometers and serves as an important recreational area for boating, fishing, and other water activities. The lake is bordered by several municipalities, including Dorval and Lachine. It plays a crucial role in local ecology and is home to various species of fish and birds. Additionally, Lake Saint-Louis is a popular spot for nature enthusiasts and offers scenic views of the surrounding landscape.