Crescent Glacier is located on the southeast slopes of Mount Adams in the U.S. state of Washington in Gifford Pinchot National Forest.

A small subpeak of Mount Adams, named South Butte, rises nearby.

Crescent Glacier lies in a small south-facing cirque with a steep headwall.

One arm of the glacier extends south down to 7,600 ft (2,300 m).

[3] Between 1904 and 2006, Crescent Glacier lost 6 percent of its surface area.