Enjoy the official Saint Mary Lake boat rentals and water sport tour activities on this second largest lake in Glacier National Park, in the state of Montana. Located on the east side of the park, the Going-to-the-Sun Road parallels the lake along its north shore. Here, the great plains end and the Rocky Mountains begin in an abrupt 5,000 feet altitude change, with Little Chief Mountain posing a formidable southern flank above the west end of the lake.
St. Mary lake has a surface area of 3,923 acres and wet suits are recommended because the water never reaches about 55 degrees in the summer months. The lake is 9.9 miles long and 300 feet deep. Enjoy a private boat tour with your group on the waters of St. Mary Lake.