HelenAir: The Jackson Glacier basin extends to the left of Mount Jackson, center, and holds the largest remaining ice fields in Glacier National Park.
This composite image of the Jackson-Blackfoot Glacier icefields in Glacier National Park shows how the formation has shrunk over time compared to the image taken in 1984. This image is from 2015. The red scar in the latest image comes from the Reynolds and Thompson fires that burned through Glacier's remote southeastern quadrant.
NASA Earth Observatory...