From Bonneval-sur-Arc
Departmental road
Col de l'Iseran — 2,764 m
Col de l'Iseran, 2,764 m, in Savoie. Main climb: 13.2 km at 7.4% average, 979 m of climbing from Bonneval-sur-Arc. The Tour de France has been over it 2 times since 2007.
At a glance
- Distance
- 13.2 km
- Elevation gain
- 979 m
- Average gradient
- 7.4 %
- Difficulty index
- 8.8 Hard
Figures for the main climb (From Bonneval-sur-Arc). The other climbs are further down.
Location
- Department
- Savoie
- Altitude
- 2,764 m
- Coordinates
- 45.41711, 7.03085
Opening Fermé l'hiver. La route du col est déneigée au printemps et rouvre en général entre fin mai et fin juin selon l'enneigement — vérifier l'état de la route avant de partir.
Map of the climbs
- From Bonneval-sur-Arc
- From Val-d'Isère
Cycling ascents
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Bonneval-sur-Arc | 13.2 km | 979 m | 13 m | 7.4 % | 12.0 % | 8.8 Hard |
| From Val-d'Isère | 15.7 km | 915 m | — | 5.8 % | 9.9 % | 7.0 Sustained |
Scroll the table sideways to see every column.
- 10% and above
- 8 to 10%
- 6 to 8%
- 4 to 6%
- under 4%
From Val-d'Isère
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.
The Tour de France here
- Crossings
- 2
- Editions
- 2
- On the route
- from 2007 to 2019
- Usual category
- Hors categorie
| Year | Stage | Cat. | First over the top |
|---|---|---|---|
| 2019 | Stage 19 | Hors categorie | Egan Bernal |
| 2007 | Stage 9 Val d'Isère → Briançon | Hors categorie |
Cols nearby
- Tignes 2,100 m · 11 km
- Col du Mont Cenis 2,083 m · 20 km
- La Plagne 1,971 m · 29 km
- Courchevel 1,756 m · 31 km
- Col du Petit-Saint-Bernard 2,188 m · 31 km
- Val Thorens 2,299 m · 38 km
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
Frequently asked questions
How long is the climb to Col de l'Iseran?
The hardest climb of Col de l'Iseran, from Bonneval-sur-Arc, is 13.2 km long for 979 m of ascent, i.e. 7.4% average.
What is the steepest part of Col de l'Iseran?
The steepest 500 m sits at 12.0%, and the hardest kilometre is the 12th, at 10.1%.
Is Col de l'Iseran open all year round?
Fermé l'hiver. La route du col est déneigée au printemps et rouvre en général entre fin mai et fin juin selon l'enneigement — vérifier l'état de la route avant de partir.
How many times has the Tour de France been over Col de l'Iseran?
The Tour de France has crossed Col de l'Iseran 2 times, from 2007 to 2019.
Col de l'Iseran: add this col to your collection
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