The Waterton-Glacier International Peace Park is the name of the union of the Waterton Lakes National Park in Canada and the Glacier National Park in the United States. Both parks are declared Biosphere Reserves by UNESCO and their union as a World Heritage Site.

Between the 526-square-kilometre Waterton Lakes and 4,051-square-kilometre Glacier National Parks, nature has provided much that is worthy of protection: high mountains and deep canyons, forest belts and prairie grasslands, deep glacial-trough lakes and rivers that feed three oceans. Indeed, few areas can claim as much diversity within such a concentrated area. Not least, the abrupt rise of the Rockies from the prairie flatlands has made the twin parks the place ?where the mountains meet the prairie.?

Matching the range of ecoregions is a corresponding diversity of wildlife - mountain goats, bighorn sheep, coyotes, grizzly bears, scores of birds, and a celebrated ?international? herd of elk that migrates annually between summer mountain habitat in Glacier and winter prairie ranges in Waterton.

An Aboriginal presence in the region goes back 12,000 years, and there remain places in both parks that hold deep significance for First Nations peoples. Indeed, the International Peace Park has grown to become a park of three nations: Canada, the United States and the Blackfoot Confederacy.