Teton Glacier is a mountain glacier located below the north face of Grand Teton (peak 13775 ft) in Grand Teton National Park, Wyoming, United States. Its neighbors are Mount Owen (12933 ft) to the west and Teewinot Mountain 12330 ft to the north. Teton Glacier is the largest of the twelve named glaciers in the park and one of 37 glaciers in Wyoming. In 1971, the glacier was about 3500 ft long and 1100 ft wide. Between 1967 and 2006, Teton Glacier lost about 14 to 20 percent of its surface area, a reduction from 64 to 53 acres.