Stockhorn, Mountain peak in Valais, Switzerland

Stockhorn is a mountain peak in Valais standing at about 3,500 meters (11,500 feet) and features steep rocky cliffs within the Swiss Alps. The summit area is marked by glaciers and high alpine terrain.

The Stockhorn's documented history is tied to the Gornergrat ski area rather than to early mountaineering. A cable car from Hohtälli via the Gornergrat railway served a station at 3,405 m west of the summit; it closed in April 2007 when its operating permit expired and was dismantled in summer 2008. A T-bar lift from Triftji replaced it in winter 2007/2008, was damaged by avalanches several times and has been out of service since 2017.

The name Stockhorn refers to the rocky summit itself, from the German Stock for a rock buttress. The mountain is the eastern end of the ridge running up from Zermatt over the Riffelhorn and the Gornergrat, and the Stockhornpass (3,387 m) separates it from the Weissgrat to the east.

Climbers access the summit through established routes from Zermatt, which require technical climbing skills and proper equipment for high-altitude conditions. Before attempting the peak, beginners should consult experienced guides and check their physical fitness.

In summer 2000 a 100-metre rock borehole was drilled at 3,420 m above the Stockhorn cable-car station. Continuous temperature readings in the hole indicate permafrost more than 170 m thick beneath the summit area.