Bishorn, Mountain summit in Pennine Alps, Switzerland.

Bishorn is a summit in the Pennine Alps of southern Switzerland, featuring two tops linked by a snow and ice ridge that sits at around 4,150 meters (13,615 ft). It belongs to the Weisshorn massif and is surrounded by glaciers on several sides.

The summit was first climbed in 1884 by a group of mountaineers with local alpine guides, at a time when the four-thousanders of the Valais were being systematically explored. The first ascent came well after the neighboring Weisshorn had already been climbed, decades earlier.

The two summits carry separate first-ascent stories: Elizabeth Burnaby reached the eastern top, Pointe Burnaby (4,134 m), on 6 May 1884 with guides Joseph Imboden and Peter Sarbach, while G. S. Barnes and R. Chessyre-Walker climbed the higher western summit on 18 August 1884 with Joseph Imboden and J. M. Chanton. The 600-metre snow ridge between the tops is easy-angled, and the mountain's name and shape tie it to the Weisshorn, whose north ridge it extends.

The climb crosses glacier terrain and requires crampons, an ice axe, and a rope, along with basic experience in alpine environments. Anyone unfamiliar with the route should go with a local mountain guide, as the terrain can become hard to read in poor visibility.

The Bishorn is among the few four-thousanders where the normal route involves no difficult rock sections, making it one of the more accessible summits of that height in the Alps. Despite this, it is often passed over in favor of the neighboring Weisshorn, which is seen as a more demanding goal.