The Wilson Glacier is a medium-sized tributary glacier located on the southeast flank of Mount Rainier in Washington. Named after A.D. Wilson, who was part of an early ascent of Mount Rainier, the body of ice has an area of 0.5 sqmi and has a volume of 1.9 billion feet3 (54 million m3). The glacier directly feeds ice to the adjacent, but much larger Nisqually Glacier. Starting from the head at 9700 ft, the glacier flows downhill southward. One part of the glacier meets the Nisqually Glacier at 8000 ft and the other part of the glacier ends on a cliff in between the Wilson and Nisqually Glacier at 7200 ft. Meltwater from the glacier feeds the Nisqually River.