Lyman Glacier lies in Washington’s North Cascades within Wenatchee National Forest, just northeast of Chiwawa Mountain. The glacier ends at a proglacial lake, and the terrain below includes smaller lakes and a pronounced terminal moraine showing how far the ice once extended. It is especially significant for its dramatic shrinkage: between 1890 and 2008, it retreated about 1,310 meters, or 4,300 feet, and lost 86 percent of its area, declining from 1.41 square kilometers to 0.02. The lakes and moraine at its terminus now make its former extent unusually clear in the landscape.