Col de Porte from Saint-Laurent-du-Pont
Col de Porte from Saint-Laurent-du-Pont: 16.5 km at 6.2% average and 1,029 m of climbing, up to 1,326 m.
- Distance
- 16.5 km
- Elevation gain
- 1,029 m
- Elevation loss
- 158 m
- Average gradient
- 6.2 %
- Start altitude
- 454 m
- Road
- Departmental road
- Surface
- Paved throughout
- Steepest 500 m
- 21.4 %
- Hardest 2 km
- 11.6 %
- Hardest kilometre
- km 4 · 8.8%
- Above 8%
- 4.6 km (28% of the climb)
- Difficulty index
- 4.9 Moderate
FIETS index: Δaltitude² / (10 × distance) + max(0, summit altitude − 1,000) / 1,000, lengths in metres. How this index works (article in French)
How long does it take?
| Level | Estimated time | Average speed |
|---|---|---|
| 2.0 W/kg — 140 W | 1h47 | 9.3 km/h |
| 3.0 W/kg — 210 W | 1h14 | 13.5 km/h |
| 4.0 W/kg — 280 W | 57 min | 17.3 km/h |
Estimated for a 70 kg rider on a 9 kg bike, in still air, at a steady effort and without stopping. Wind, a stop at the fountain or a wheel to sit on move these figures by several minutes.
The route
Climb profile
- 10% and above
- 8 to 10%
- 6 to 8%
- 4 to 6%
- under 4%
Kilometre by kilometre
| Km | Gradient | Altitude at the top of the km |
|---|---|---|
| 1 | 5.0 % | 504 m |
| 2 | 2.6 % | 531 m |
| 3 | 7.4 % | 605 m |
| 4 | 8.8 % | 693 m |
| 5 | 4.6 % | 739 m |
| 6 | 3.6 % | 775 m |
| 7 | 1.8 % | 792 m |
| 8 | 2.0 % | 812 m |
| 9 | 0.3 % | 815 m |
| 10 | 5.7 % | 872 m |
| 11 | 5.6 % | 928 m |
| 12 | 6.4 % | 992 m |
| 13 | 7.6 % | 1,068 m |
| 14 | 8.4 % | 1,151 m |
| 15 | 6.8 % | 1,219 m |
| 16 | 8.6 % | 1,305 m |
| 17 (partial) | 3.5 % | 1,325 m |
Download the GPX track All climbs of this col
The other climbs of this col
- From Grenoble 18.3 km · 6.2 %
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 long does it take to climb Col de Porte from Saint-Laurent-du-Pont?
Col de Porte from Saint-Laurent-du-Pont takes about 1h14 at 3.0 W/kg, i.e. 13.5 km/h on average. The page gives three levels and their assumptions.
Col de Porte: add this col to your collection
Sleipnir recognises the cols you cross from the GPS trace of your rides: the col ticks itself off the day you ride over it.
Create an accountFree during the beta, no card required — places are limited.
A Polar watch syncs on its own; with any other watch, import your GPX or TCX files.