Damma Glacier, Alpine glacier in Uri, Switzerland.

Damma Glacier is a hanging glacier on the eastern slope of the Winterberg massif in the Urner Alps, canton Uri. It begins at about 3300 m below the Dammastock rock wall, flows east as a broad firn field with slopes exceeding 40%, and its narrow tongue ends at 2060 m. It is flanked by the Gletschhorn (3305 m) and Winterstock (3203 m), and is connected to the Rotfirn firn field to the north.

Around 1850, at the end of the Little Ice Age, the Damma Glacier reached its greatest extent in three centuries, descending to the valley floor where the Göscheneralp reservoir now lies. Since then it has retreated, interrupted by brief advances. Its extent has been documented since 1921, and a research consortium including ETH Zurich continuously records temperature, humidity, precipitation, airborne nitrogen and every retreat of the tongue.

The Damma Glacier is one of the most intensively studied glaciers in the world. Since 1921 its extent has been documented, and a research consortium of ETH Zurich with other Swiss, German and English-speaking universities continuously records temperature, humidity, precipitation, the nitrogen content of the surrounding air and every retreat of the tongue tip. The Dammahütte of the Swiss Alpine Club stands below the glacier at 2439 m and serves as a base for climbs in the Winterberg massif.

The site is most accessible during summer months when snow has melted and paths are easier to navigate. Sturdy footwear is essential, as the terrain is rocky and uneven throughout the area.

The Damma Glacier is one of the most intensively studied glaciers in the world. Since 1921 its extent has been documented, and a research network led by ETH Zurich with Swiss, German and English-speaking universities continuously records temperature, humidity, precipitation, the nitrogen content of the surrounding air and every retreat of the tongue tip.