The Bifertenstock () is a mountain in the Glarus Alps, located at an elevation of 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. Glaciers cover both sides of the mountain, but are smaller on the southern side.