Andrews Glacier is an alpine glacier in a cirque below Otis Peak in Rocky Mountain National Park in the U.S. state of Colorado. The glacier extends from Andrews Pass at nearly 12,000 to 11,700 feet with some perennial snow extending to Andrews Tarn, a small proglacial lake. When images of the glacier taken in the early 1900s are compared with those of the early 2000s, Andrews Glacier is showing a negative glacier mass balance which indicates the glacier is retreating.