Sunday, May 2, 2027
Distance
Climb
Terrain
Difficulty
Three races start from Willer-sur-Thur on Sunday 2 May 2027. The Montée climbs to the summit of the Grand Ballon, the Défi is a longer trail that passes the Ostein rock and the summit before descending through Geishouse, and the Mini-Trail is a gentle nature introduction to trail running with views over the valley. The routes are mountain tracks and trails, and the climbs and descents make up most of the day's effort. Free shuttle buses run between the summit and Willer-sur-Thur before and after the races, so runners can leave a car at the top.
Finish at the summit of the Grand Ballon
Passage at the Ostein rock on the 36.1 km Défi
Free shuttle buses between the summit and Willer-sur-Thur
Valley viewpoints on the Mini-Trail de l'Ostein
Start / Finish
Willer-sur-Thur (departure point for all three races)
Summit of the Grand Ballon for La Montée; Willer-sur-Thur for Le Défi (return via Geishouse)
Race Day
What you get
Free shuttle buses between the summit of the Grand Ballon and Willer-sur-Thur, no booking required
On the day
Other questions
The mountain race is open to the Espoir, Sénior and Master categories, for runners aged 20 and over. Men and women start together at a single start.
The 36.1 km Défi starts at Willer-sur-Thur, passes the Ostein rock at Goldbach-Altenbach, climbs to the summit of the Grand Ballon, then descends back to Willer-sur-Thur through Geishouse.
Entry fee not listed
Check the race's registration page for pricing.Willer-sur-Thur, France
Sunday, May 2, 2027
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