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Glacier National Park is located in the U.S. state of Montana, bordering the Canadian provinces of Alberta and British Columbia to the North and the Blackfeet Indian Reservation to the East. Glacier National Park contains two mountain ranges (sub-ranges of the Rocky Mountains), which are sometimes referred to as the southern extension of the Canadian Rockies. The park encompasses over 1 million acres, with 300 lakes (130 of which are definitively named), more than 1,100 different species of vascular plants, 400 species of moss and hundreds of species of animals.

Glacier National Park is dominated by mountains which were carved into their present shapes by the huge glaciers of the last ice age; these glaciers have largely disappeared over the last 15,000 years. Evidence of widespread glacial action is found throughout the park in the form of U-shaped valleys, glacial cirques, aretes and large outflow lakes radiating like fingers from the base of the highest peaks. Since the end of the ice ages, various warming and cooling trends have occurred.