What is "gastlosen"

The Gastlosen are a mountain range of the Swiss Prealps, lying between the cantons of Fribourg, Bern and Vaud. They form a chain stretching from Jaun to Rougemont, culminating at the Dent de Savigny, elevation , just south-west of the Dent de Ruth, where the three cantonal borders meet.

The Trophée des Gastlosen is a competition of ski mountaineering which takes place in the area.