Downgraded from a glacier to a snowfield in 1998, Arapahoe Glacier is within the city of Boulder's protected watershed.
This gelatin silver print was taken by Ed Tangen in 1921 and is part of the Library of Congress' American Memory collection. Note the people on the glacier (select the image to see a full size version.) This area is currently off limits to the general public in order to protect the water quality of the area, which serves as a major source of water for the city of Boulder. The Glacier was downgraded to a snowfield in 1998. See the BASIN Gallery for more historic images of this region.