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Sperry Glacier

Glacier in Glacier NP, Rocky Mountains near Lake McDonald Hotel, MT

Sperry Glacier has diminished in area by 40% from 1966 to 2015.

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Sperry Glacier is located in Glacier National Park in the U.S. state of Montana. This glacier is situated on the north slopes of Gunsight Mountain, west of the Continental Divide. Although many geologic features of Glacier National Park were formed during the much longer period of glaciation ending over 10,000 years ago, Sperry Glacier — like all the glaciers in the park today — is a product of the recent Little Ice Age, the period of cooler average temperatures starting in about the 13th century and concluding in the mid-19th century. Once one of the largest glaciers in the park, the surface area of Sperry Glacier has retreated 75 percent since the mid-19th century. 2005 measurements of the surface area of the glacier resulted in an estimated area of 216 acres (0.87 km2), whereby the…