The Bolsterlanger Horn is a grass mountain in the Allgäu Alps in Bavaria. Because its 1,586-metre-high summit rises above Bolsterlang, it is the local mountain (Hausberg) of this village. The Bolsterlanger Horn is part of the Hörner group and its southernmost peak. The topographic prominence of the Bolsterlanger Horn is at least 46 metres, its isolation is 600 metres, the Weiherkopf being the reference summit.