Unteraargletscher

Oberaargletscher (left hand in the background) and Unteraargletscher (on the right). The small blue lake left hand in front is the Triebtenseewli.
Unteraargletscher
Aerial view from the east
Map showing the location of Unteraargletscher
Map showing the location of Unteraargletscher
Unteraargletscher
Map showing the location of Unteraargletscher
Map showing the location of Unteraargletscher
Unteraargletscher
LocationBern, Switzerland
Coordinates46°34′0″N 8°13′0″E / 46.56667°N 8.21667°E / 46.56667; 8.21667
Length13 km
Map

The Unteraargletscher (German: [ˈʊntəraːrˌglɛtʃər]), literally "Lower Aare-Glacier", is the larger of the two sources of the Aare river in the Bernese Alps. It emerges from the association of the Finsteraargletscher (near the Finsteraarhorn) and the Lauteraargletscher (near the Lauteraarhorn) and flows for about 6 km (3.7 mi) to the east down to the Grimselsee near the Grimsel Pass. In total the glacier was 12.95 km (8.05 mi) long and 29.48 km2 (11.38 sq mi) in area in 1973. Its lower end is (or was) almost 400 metres lower than that of the neighbouring Oberaargletscher.

In the 18th and 19th centuries, it was one of the first subjects of developing glaciology.