Les Courses du Grand Ballon 2027

02.05.2027Willer-sur-Thur (France)

Pacing, fueling and crew sheet for the course you pick

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3 courses · 9–25 km5.6–15.5 mi · up to 1’320 m D+up to 4’331 ft D+

At a glance

Les Courses du Grand Ballon 2027 takes place on Sunday 2 May 2027 in Willer-sur-Thur (Haut-Rhin, France). Three distances to choose from: 9, 14.2 and 25 km.

Longest course: Le Défi du Grand Ballon, 25 km with 1’320 m D+ (53 m per km: mountain terrain). Terrain: 36% trail, 49% forest track and 14% road. Terrain data: © OpenStreetMap contributors.

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3 courses

9km5.6mi
350 m D+1’148 ft D+
1’416 m D-4’646 ft D-
avg 4%
Le Mini-Trail de l'Ostein
02.05.
No index
GPX
14.2km8.8mi
1’220 m D+4’003 ft D+
173 m D-568 ft D-
avg 9%
La Montée
02.05.
No index
GPX
25km15.5mi
1’320 m D+4’331 ft D+
1’171 m D-3’842 ft D-
avg 5%
Le Défi du Grand Ballon
02.05.
No index
GPX

Course analysis

25 km15.5 mi1’320 m D+4’331 ft D+

38effort kmⓘ25 km on the map · feels like 38 km15.5 mi on the map · feels like 38 km

D+: 1’320 m4’331 ft
D−: 1’171 m3’842 ft
Max alt.: 1’413 m4’636 ft
Steepest: 13%

Segments

Elevation profile: Le Défi du Grand Ballon

374 m – 1’413 m1’227 ft – 4’636 ft

Race plan

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Where to stay

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