National preserve, northwestern Montana, U.S. Set in the state's Rocky Mountains wilderness, it adjoins the Canadian border and Canada's Waterton Lakes National Park .
The two parks together compose the Waterton-Glacier International Peace Park, dedicated in 1932. Glacier National Park was established in 1910 and encompasses 1,013,572 acres (410,178 hectares). The park, with its active glaciers, straddles the Continental Divide .