From Saint-Laurent-du-Pont
Departmental road
Col de Porte — 1,326 m
Col de Porte, 1,326 m, in Isère. Main climb: 16.5 km at 6.2% average, 1,029 m of climbing from Saint-Laurent-du-Pont. The Tour de France has been over it 1 times since 2020.
At a glance
- Distance
- 16.5 km
- Elevation gain
- 1,029 m
- Average gradient
- 6.2 %
- Difficulty index
- 4.9 Moderate
Figures for the main climb (From Saint-Laurent-du-Pont). The other climbs are further down.
Location
- Department
- Isère
- Altitude
- 1,326 m
- Coordinates
- 45.28994, 5.76700
Map of the climbs
- From Saint-Laurent-du-Pont
- From Grenoble
Cycling ascents
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Saint-Laurent-du-Pont | 16.5 km | 1,029 m | 158 m | 6.2 % | 21.4 % | 4.9 Moderate |
| From Grenoble | 18.3 km | 1,139 m | 31 m | 6.2 % | 13.0 % | 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 Grenoble
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
- 1
- Editions
- 1
- On the route
- from 2020 to 2020
- Usual category
- Category 2
| Year | Stage | Cat. | First over the top |
|---|---|---|---|
| 2020 | Stage 16 | Category 2 | Pierre Rolland |
Chains with
- Col de Palaquit 1,154 m
Cols one of the climbs above actually rides over — not merely neighbours as the crow flies.
Cols nearby
- Col du Coq 1,434 m · 6 km
- Col de Pressembois 570 m · 13 km
- Col des Mille Martyrs 884 m · 17 km
- Col de Couz 636 m · 20 km
- Col de Chamrousse 1,800 m · 21 km
- Col de Parménie 578 m · 24 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 Porte?
The hardest climb of Col de Porte, from Saint-Laurent-du-Pont, is 16.5 km long for 1,029 m of ascent, i.e. 6.2% average.
How many times has the Tour de France been over Col de Porte?
The Tour de France has crossed Col de Porte 1 times, from 2020 to 2020.
Col de Porte: add this col to your collection
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