Glacier National Park was established in 1910 and covers about 4100 square kilometres. It is located in north-west Montana and borders the Canadian border and Canadian national park, Waterton Lakes. In fact, the two parks are known at the Waterton-Glacier International Peace Park and were designated as the world's first International Peace Park in 1932. Both parks were designated by the United Nations as Biosphere Reserves in 1976, and UNESCO World Heritage Site in 1995. In 2017, Waterton-Glacier were given Gold Tier status by the International Dark Sky Association.