Challenge

Challenge

From Val-d’Illiez, under the Dents du Midi, the course gathered 4,387 m of ascent and 4,970 m of descent on its way to Lake Geneva. The organiser describes it as panoramic trails in an accessible format, rated intermediate to advanced, with three ITRA points and no qualifying points needed. Seven refuelling stations stood along the route, and a bus transfer from Le Bouveret to the start was included in the entry.

A 05:00 start is the point of this race: the first hours ran in the dark and the rest in daylight. The organiser expected the fastest runners after about eight hours and the last ones in the early evening, around 18:30, so the whole field reached the lake on the same day it set off. This page belongs to the 2026 Challenge.

A one-day race is the kind that friends follow from the finish area, phone in hand. On Livebib the runner shares a link that opens in a browser, with no account and no app, showing the position on the course line, the distance covered and an arrival estimate in Le Bouveret that updates as the race goes. Where the trail drops into a valley without coverage, the position is carried forward along the course and marked as estimated, never shown as measured.