From Le Bourg-d'Oisans
Main road
Col des Portes — 1,835 m
Col des Portes, 1,835 m, in Hautes-Alpes. Main climb: 28.7 km at 4.8% average, 1,383 m of climbing from Le Bourg-d'Oisans.
At a glance
- Distance
- 28.7 km
- Elevation gain
- 1,383 m
- Average gradient
- 4.8 %
- Difficulty index
- 4.8 Moderate
Figures for the main climb (From Le Bourg-d'Oisans). The other climbs are further down.
Location
- Department
- Hautes-Alpes
- Altitude
- 1,835 m
- Coordinates
- 45.04866, 6.29003
Map of the climbs
- From Le Bourg-d'Oisans
Cycling ascents
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Le Bourg-d'Oisans | 28.7 km | 1,383 m | 312 m | 4.8 % | 18.1 % | 4.8 Moderate |
Scroll the table sideways to see every column.
- 10% and above
- 8 to 10%
- 6 to 8%
- 4 to 6%
- under 4%
1 ascent 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.
Cols nearby
- Col du Lautaret 2,058 m · 9 km
- Col du Galibier 2,642 m · 9 km
- Col de Sarenne 1,999 m · 12 km
- Alpe d'Huez 1,860 m · 18 km
- Col du Mollard 1,638 m · 18 km
- Col du Télégraphe 1,566 m · 21 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 des Portes?
The hardest climb of Col des Portes, from Le Bourg-d'Oisans, is 28.7 km long for 1,383 m of ascent, i.e. 4.8% average.
Col des Portes: add this col to your collection
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