Mount Jackson is located in the Lewis Range, Glacier National Park in the U.S. state of Montana. Mount Jackson is the fourth tallest mountain in Glacier National Park and it is situated on the Continental Divide. Both the mountain and its namesake Jackson Glacier are easily seen from the Going-to-the-Sun Road. On the southern flanks of Mount Jackson is Harrison Glacier, the largest remaining glacier in the park. Route Descriptions can be found on Summitpost or in "A Climbers Guide to Glacier National Park.