Rottalhorn, Mountain summit on the Bern–Valais border, Switzerland

Rottalhorn is a 3,971 m summit of the Bernese Alps on the border between the cantons of Bern and Valais. It rises 600 m south of the Jungfrau, between the small Rottal valley and the Jungfraufirn, part of the Aletsch Glacier.

The Rottalhorn's documented record is cartographic rather than exploratory: it appears in Swiss topographic surveys as a 3,971 m point on the Bern–Valais border, 600 m south of the Jungfrau. The sources consulted record no first ascent, no named climbers and no dated routes on the mountain.

The name Rottalhorn derives from the Rottal, the small valley on its western side, and Horn, the German word for a peak. The summit lies on the Bern–Valais cantonal border, 600 m south of the Jungfrau, and is climbed from the Rottal side; the Hikr route database lists it among the peaks reached from that valley.

The approach begins from Stechelberg and leads to Rottalhatte, followed by a roughly 45-minute walk to the climbing starting point. Mountaineers should be experienced with Alpine climbing and carry proper gear for technical rock work.

The Rottalhorn rises 3,971 m on the Bern–Valais border, about 600 m south of the Jungfrau. It stands between the small Rottal valley and the Jungfraufirn, a tributary of the Aletsch Glacier. The Chinese Wikipedia entry gives 3,972 m and an average annual rainfall of 2,221 mm.