From Fessy
Minor departmental road
Col de Cou, 1,116 m, in Haute-Savoie. Main climb: 7.8 km at 7.4% average, 577 m of climbing from Fessy. The Tour de France has been over it 1 times since 2023.
Figures for the main climb (From Fessy). The other climbs are further down.
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Fessy | 7.8 km | 577 m | — | 7.4 % | 12.3 % | 4.4 Moderate |
| From Boëge | 11.7 km | 397 m | 23 m | 3.4 % | 8.3 % | 1.3 Easy |
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Minor departmental road
Minor departmental road
2 ascents proposed here — other ways up this col remain possible.
Distances and elevation gains derived from the OpenStreetMap road network and a digital terrain model, measured on the very profile shown here.
Figures computed on 7 September 2026.
| Year | Stage | Cat. | First over the top |
|---|---|---|---|
| 2023 | Stage 14 Annemasse → Morzine | Category 1 | Giulio Ciccone |
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
The hardest climb of Col de Cou, from Fessy, is 7.8 km long for 577 m of ascent, i.e. 7.4% average.
The steepest 500 m sits at 12.3%, and the hardest kilometre is the 5th, at 9.6%.
The Tour de France has crossed Col de Cou 1 times, from 2023 to 2023.
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