Hüfi Glacier, Alpine glacier in Uri, Switzerland.

The Hüfi Glacier (Hüfifirn) is a valley glacier in the Glarus Alps, entirely within the canton of Uri above the Maderanertal. It begins at about 3,000 m on the southwest flank of the Clariden, where a 3 km-wide upper basin is ringed by the Schärhorn, Chammliberg, Clariden, Heimstock and Düssistock. It is roughly 7 km long and up to 3 km wide above, narrowing to about 500 m in the valley; its tongue ends at 1,950 m (2022), and the Chärstelenbach rises from it.

The Hüfi Glacier reached its maximum extent during the Little Ice Age in the mid-19th century; since then it has retreated about 2 km. Its tongue still descends to 1950 m (2022), one of the lowest in the Alps thanks to a narrow, shaded valley. Below the tongue, at 1635 m, the Hüfisee has formed. Since 2001 the glacier forefield has been protected as a 184 ha floodplain of national importance.

The glacier lies in the Maderanertal, a side valley of the Reuss in the municipality of Silenen, and its meltwater forms the Chärstelenbach. Two Swiss Alpine Club huts stand at its edge: the Hüfihütte at 2334 m on the north slope of the Grosser Düssi and the Planurahütte at 2947 m south of the Claridenpass.

The glacier is reached from the Maderanertal, an eastern side valley of the Reuss in the municipality of Silenen. Two Swiss Alpine Club huts stand at its edge: the Hüfihütte at 2334 m above the tongue and the Planurahütte at 2947 m south of the Clariden Pass. The tongue lies at 1950 m (as of 2022), and the Hüfisee has formed below it at 1635 m.

Below the glacier tongue, at 1,635 m, lies the Hüfisee, a lake that formed only after the ice retreated. The tongue itself reaches down to 1,950 m (2022), making it one of the lowest glacier tongues in the Alps because it sits in a narrow, shaded valley. Since 2001 the 184-hectare glacier forefield has been protected as a floodplain of national importance.