Lake St. Mary is a freshwater lake located in the state of Montana, near the eastern edge of Glacier National Park. It covers an area of approximately 20 square miles and is known for its stunning blue waters and surrounding mountain scenery. The lake is a popular destination for outdoor activities such as fishing, boating, and hiking. The lake is fed by several streams and is home to various fish species, including trout and pike. Visitors can enjoy scenic views from the shoreline or take part in guided tours to explore the natural beauty of the area. Lake St. Mary is also a key part of the local ecosystem, supporting diverse wildlife.