The Bifertenstock (Romansh: Piz Durschin) is a mountain in the Glarus Alps, located at an elevation of 3,419 m (11,217 ft) on the border between the cantons of Glarus (north) and Graubünden (south), its peak, however, is located about 25 metres south of the border.

It overlooks four valleys: the valley of the Biferten Glacier to the north-west, the Griess Glacier to the north-east, the Val Punteglias to the south, which leads down to Trun, and the Val Frisal on the south-east.

[2] The mountain lies in the municipalities of Trun and Breil/Brigels, in the canton of Graubünden, and Glarus Süd, in the canton of Glarus.

The nearest settlements are the villages of Trun, to the south, and Linthal, to the north.

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