Eleven named glaciers descend from Mount Baker. Two additional glaciers (Hadley Glacier and Sholes Glacier) descend from lower slopes detached from the main glacial mass. The Coleman Glacier is the largest; it has a surface area of . The other large glaciers—which have areas greater than —are Roosevelt Glacier, Mazama Glacier, Park Glacier, Boulder Glacier, Easton Glacier, and Deming Glacier. All retreated during the first half of the century, advanced from 1950-1975 and have been retreating with increasing rapidity since 1980.