The Ober Gabelhorn (4063 m) is a mountain in the Pennine Alps in Switzerland, located between Zermatt and Zinal. Geography The Ober Gabelhorn lies in the Swiss canton of Valais at the southern end of the Zinal valley (part of the Val d'Anniviers). It rises, together with the Dent Blanche (west) and the Zinalrothorn (north), above the Zinal Glacier. On the south side lies the Zmutt Glacier in the valley of Zmutt, which extends west of Zermatt. The Ober Gabelhorn has a pyramidal shape, similar to the nearby Matterhorn but on a smaller scale. Only the smooth north face is completely glaciated, the other faces being mostly rocky. The south-west ridge is called the Arbengrat while the north-north-west ridge is the Arête du Coeur. The south-east ridge looking over the Ober Gabeljoch (3,597 m) is the Gabelhorngrat. The Wellenkuppe is a lower prominence on the north-east ridge; it is usually climbed as part of the normal route. Huts serving the peak are the Rothorn Hut (3,198 m), the Grand Mountet Hut (2,886 m) and the Arben Bivouac (3,224 m). Climbing history The first ascent was by A. W. Moore, Horace Walker and Jakob Anderegg on 6 July 1865, via the east face. The second ascent of the peak, and the first by the north-north-west ridge, was made one day later by Lord Francis Douglas, Peter Taugwalder and Joseph Vianin on 7 July 1865. At the time of their ascent they were not aware of Moore and party's success on the previous day. Douglas and Taugwalder made several attempts before they reached the summit. P. Inäbnit accompanied them on the first attempt from the south-east ridge. They didn't have enough time to go higher than the base of the mountain. On the second attempt they reached the Wellenkuppe (3,900 m) on the north-east ridge (the normal route today) but they considered that the ridge above was too difficult to continue. They finally reached the summit on their third attempt (Inäbnit having been replaced by Viennin). They were disconcerted to see some footprints on the east face (made by Moore, Walker and Anderegg on the previous day), but were relieved that no traces were visible on the summit. Not aware of the dangers that might have made the previous expedition turn back, they sat down on the summit to have lunch. Suddenly an avalanche started and everything on the summit began to