Glacier National Park is a United States National Park and a UNESCO World Heritage site that is on the northern border of Montana. Glacier National Park borders Waterton Lakes National Park in Canada — the two parks are known as the Waterton-Glacier International Peace Park, and were designated as the world's first International Peace Park in 1932. The parks were designated by the United Nations as Biosphere Reserves in 1976, and in 1995 as World Heritage sites.

Glacier National Park is a stunning display of the geological processes that changed North America over the last billion years.The rock formations in the park are almost entirely sedimentary, laid down between 1600 to 800 million years ago when this area was an inland sea. 

The park offers many opportunities to see wildlife, and its ecosystems are almost unchanged from what they were at the time of Lewis and Clark. Different trails offer visitors close encounters with animals from mountain goats to pine Martens.

- Wikivoyage