From Saint-Alban-Leysse
Departmental road
Col des Prés, 1,134 m, in Savoie. Main climb: 14.8 km at 6.2% average, 915 m of climbing from Saint-Alban-Leysse. The Tour de France has been over it 2 times since 1998.
Figures for the main climb (From Saint-Alban-Leysse). The other climbs are further down.
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Saint-Alban-Leysse | 14.8 km | 915 m | 78 m | 6.2 % | 11.3 % | 4.9 Moderate |
| From Lescheraines | 15.8 km | 589 m | 25 m | 3.7 % | 9.4 % | 2.2 Easy |
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Departmental road
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 |
|---|---|---|---|
| 2026 | Stage 17 Chambéry → Voiron | Category 3 | Mathieu van der Poel |
| 1998 | Stage 17 29 juillet → 29 juillet | Category 3 |
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
The hardest climb of Col des Prés, from Saint-Alban-Leysse, is 14.8 km long for 915 m of ascent, i.e. 6.2% average.
The steepest 500 m sits at 11.3%, and the hardest kilometre is the 13th, at 9.5%.
The Tour de France has crossed Col des Prés 2 times, from 1998 to 2026.
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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