Jackson Glacier

Jackson Glacier is a mountain glacier on the north side of Mount Jackson in Glacier National Park, Glacier County, Montana, sitting south of the Going-to-the-Sun Road on the east side of the Continental Divide in the upper St. Mary Valley. As of 2005 it covered about 250 acres and measured 0.7 miles long, making it roughly the seventh largest of the park's 25 remaining glaciers, but it is retreating quickly, having lost nearly a third of its area between 1966 and 2005 alone; as recently as 1850 it was joined to the now-separate Blackfoot Glacier in a combined ice mass of 1,875 acres. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/