Glacier National Park is located in the U.S. state of Montana, south from the Canadian borders of Alberta and British Columbia. The park encompasses over 1,000,000 acres (4,000 km2) and includes parts of two mountain ranges (sub-ranges of the Rocky Mountains), over 130 named lakes, more than 1,000 different species of plants and hundreds of species of animals. This vast pristine ecosystem is the centerpiece of what has been referred to as the "Crown of the Continent Ecosystem", a region of protected land encompassing 16,000 square miles (41,000 km2).
The Lewis Range is a mountain range located in the Rocky Mountains of northern Montana, U.S. and extreme southern Alberta, Canada. Formed by the Lewis Overthrust beginning 170 million years ago, an enormous slab of Precambrian rocks 3 miles (4.8 km) thick, 50 miles (80 km) wide and 160 miles (260 km) long faulted and slid over newer rocks of the Cretaceous period. In this relatively rare occurrence, older rocks are now positioned above newer ones.
The Lewis Range is within Waterton Lakes National Park in Canada, and in Glacier National Park and the Bob Marshall Wilderness Complex located in Flathead and Lewis and Clark National Forests in Montana. The Continental Divide spans much of the uppermost sections of the range. Major peaks in the range include Mount Cleveland (10,466 ft/3,185 m), which is the highest peak in the range and in Glacier National Park. Other prominent peaks include Mount Stimson (10,142 ft/3,091 m), Mount Jackson (10,052 ft/3,064 m), Mount Siyeh (10,014 ft/3,052 m), Going to the Sun Mountain, (9,642 ft/2,939 m) and the isolated Chief Mountain (9,080 ft/2,768 m). The Chinese wall in the Bob Marshall Wilderness is a 1,000 foot (304 m) high feature that runs for 40 miles (64 km). Major passes include Marias Pass and Logan Pass which bisects Glacier National Park east to west.