Lake McDonald

Located in the heart of the Glacier National Park, Lake McDonald charms visitors with its stunning blue waters against the backdrop of imposing alpine landscapes. It is the largest lake in the park, spanning over 10 miles (16 kilometers) in length and up to 1.5 miles in width (2.41 kilometers), with a maximum depth of around 470 feet (143.2 meters). One of the defining features of Lake McDonald is its crystal clear water, which is fed by the surrounding mountain streams and rivers. The lake's water is cold, even in the summer, and has a blue-green tint due to the presence of glacial rock flour suspended in the water.