Weissfluh, Mountain peak in Grisons, Switzerland

Weissfluh is a 2,843-metre summit in the Plessur Alps of Grisons, the highest point of the former municipality of Langwies (now Arosa) and of the Davos Parsenn ski area. Its main peak lies on the southwestern edge of a broad scree plateau; a 2,834-metre north peak about 300 metres northwest carries the Arosa–Klosters-Serneus municipal boundary. An aerial tramway runs from Weissfluhjoch to the summit plateau, which holds a panorama restaurant, SLF snow and avalanche research measuring stations, military and radio installations, and a MeteoSwiss weather radar built in 2014.

In the early decades of the 20th century, cable car systems began opening up the mountains around Davos, and the Weissfluh was progressively made accessible for winter sports. That development turned the surrounding area into one of the most visited ski regions in the Alps.

The summit lies on the watershed between the Prättigau and Schanfigg valleys; the saddle at 2,623 m between Weissflue and Weissfluhjoch is officially named "Wasserscheidi". The mountain was formerly called Gablerflue and is the highest point of the former municipality of Langwies, now part of Arosa. The main summit stands entirely on Arosa territory, while the 2,834 m north summit carries the municipal boundary with Klosters-Serneus.

The easiest way to reach the top is by taking the aerial tramway from Weissfluhjoch, which saves a long uphill walk. If you plan to hike, wear sturdy boots and carry a rain layer since weather at this altitude can shift without much warning.

A weather radar installation has been running on the summit since 2014, continuously collecting data to support regional forecasting and avalanche research. The station is small and easy to miss, but it feeds into the safety systems that protect valleys below during winter storms.