From Menton
Departmental road
Col de Castillon, 728 m, in Alpes-Maritimes. Main climb: 12.9 km at 5.4% average, 690 m of climbing from Menton. The Tour de France has been over it 2 times since 1919.
Figures for the main climb (From Menton). The other climbs are further down.
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Menton | 12.9 km | 690 m | 30 m | 5.4 % | 11.4 % | 3.4 Moderate |
| From Sospel | 6.9 km | 344 m | — | 5.0 % | 7.9 % | 1.7 Easy |
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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 |
|---|---|---|---|
| 1935 | Stage 11 Nice → Cannes | — | Francesco Camusso |
| 1919 | Stage 9 | — |
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
The hardest climb of Col de Castillon, from Menton, is 12.9 km long for 690 m of ascent, i.e. 5.4% average.
The steepest 500 m sits at 11.4%, and the hardest kilometre is the 5th, at 7.6%.
The Tour de France has crossed Col de Castillon 2 times, from 1919 to 1935.
Sleipnir recognises the cols you cross from the GPS trace of your rides: the col ticks itself off the day you ride over it.
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