St. Marys Lake is a picturesque body of water located in the Glacier National Park in Montana, USA. It covers an area of approximately 3,000 acres and is known for its stunning blue color, which is a result of glacial silt. The lake is surrounded by majestic mountains and offers various recreational activities, including fishing, boating, and hiking along its scenic shores. The lake is also home to several islands, with Wild Goose Island being the most famous. St. Marys Lake is a popular destination for visitors seeking natural beauty and outdoor adventures, making it a key attraction within the park.