Glaciers of Glacier National Park Repeat Photography Collection

The “Glaciers of Glacier National Park Repeat Photography Collection” is a compilation of photographs documenting the retreat of glaciers in Glacier National Park, Montana, U.S.A. (GNP) through repeat photography. The collection is comprised of 58 image pairs, resulting from twenty-two years of U.S.Geological Survey (USGS) field excursions (1997-2019) for the purpose of photographically documenting glacier change. Historic images of glaciers were located at the USGS Photographic Library, GNP Archives, and the University of Montana Special Collections. Employees and volunteers of the USGS Repeat Photography Project relocated the site of each historic photograph and re-photographed the image to create a historic-contemporary pairing taken from the same location. Historical images in this collection range from 1887 to 1943; modern-era images range from 1997-2019. The collection contains images of 18 different glaciers, available for download in paired format or individual photographs. Credit and copyright status are provided for each image. In addition to documenting visual change in glacier size and shape, the images have been widely used to illustrate the impact of climate warming on the glaciers of Glacier National Park.