Avalanche Glacier

{{Short description|Glacier in Washington, United States}}

{{Use mdy dates|date=January 2025}}

{{Infobox glacier

| name = Avalanche Glacier

| photo = Mount Adams US99.jpg

| photo_caption = Avalanche Glacier can be seen in the center of the photo. It is fed by the White Salmon Glacier, which is located to the upper-left of Avalanche Glacier.

| type = Mountain glacier

| location = Yakima County, Washington, USA

| map = USA Washington#USA

| label_position = right

| map_size = 225

| coordinates = {{coord|46|11|04|N|121|30|36|W|region:US-WA|format=dms|display=inline,title}}

| coordinates_ref = {{cite gnis|id=1515991|name=Avalanche Glacier|accessdate=2012-11-03}}

| area = {{convert|0.86|sqkm|abbr=on}} in 2006

| length = {{convert|1|mi|abbr=on}}

| thickness =

| terminus = Talus

| status = Retreating

}}

Avalanche Glacier is located on the west to southwest slopes of Mount Adams a stratovolcano in the Gifford Pinchot National Forest in the U.S. state of Washington.{{Cite map|publisher=TopoQwest (United States Geological Survey Maps)|title=Mount Adams West, WA|url=http://www.topoquest.com/map.php?lat=46.19051&lon=-121.50479&datum=nad83&zoom=8&map=auto&coord=d&mode=zoomout&size=m|accessdate=2012-11-03}} The glacier descends from the White Salmon Glacier at {{convert|10200|ft|abbr=on}} to a terminus near {{convert|7600|ft|abbr=on}}. Avalanche Glacier has been in a general state of retreat for over 100 years and lost 59 percent of its surface area between 1904 and 2006.{{cite journal|last=Sitts|first=Danielle |author2=Andrew G. Fountain |author3=Matthew J. Hoffman|title=Twentieth Century Glacier Change on Mount Adams, Washington, USA|journal=Northwest Science|year=2010|volume=84|issue=4|pages=378–385|doi=10.3955/046.084.0407|url=http://glaciers.pdx.edu/fountain/MyPapers/SittsEtAl2010_GlaciersMt.Adams.pdf|accessdate=2012-11-03|publisher=Northwest Scientific Association|format=pdf}} Avalanche Glacier is also known for its yellowish-brown rocks that descend along the glaciers path.