Turtmann Glacier, glacier in the Turtmann valley, Valais, Switzerland

Turtmann Glacier is a 5.1 km valley glacier in the Valais Alps, starting on the northwest flank of the Bishorn at about 4,150 m and ending near 2,200 m, where it feeds the Turtmänna. Its lower section is still roughly 600 m wide, and an arm of the Brunegg Glacier joins it from the east. The Cabane de Tracuit (3,256 m) stands above the western edge.

Around the middle of the 19th century, during the Little Ice Age, the glacier reached about 1 km further down the valley and sent a short tongue over the Col de Tracuit towards Zinal. Between 1980 and 2000 it was one of the few Swiss glaciers to advance in length. On 6 August 2020 a large icefall broke off, separating the lower glacier from the upper part.

The Swiss Alpine Club maintains the Tracuit Hut at the glacier's edge, supporting mountaineers who climb the surrounding peaks of Bishorn and Weisshorn.

The glacier is not a site to be visited on foot: its tongue ends at about 2,240 m and the ice is reached only by experienced high-alpinists. The usual approach runs from the Turtmannhütte (2,519 m, 3 hours from Gruben) over the Brunegg Glacier, the Adlerflüe rocks and the Turtmann Glacier to the Cabane de Tracuit at 3,256 m. Since the collapse of 6 August 2020 the lower and upper glacier are no longer connected.

In the mid-19th century, during the Little Ice Age, the glacier reached about 1 km further down the valley and sent a short tongue over the Col de Tracuit toward the Val d'Anniviers above Zinal. Between 1980 and 2000 it was one of the few Swiss glaciers that gained length overall. On 6 August 2020 a large ice avalanche in the great icefall severed the lower glacier from the upper part.