Col du Marais from Marlens (Val de Chaise)
Col du Marais from Marlens (Val de Chaise): 12.6 km at 3.8% average and 478 m of climbing, up to 843 m.
- Distance
- 12.6 km
- Elevation gain
- 478 m
- Elevation loss
- 98 m
- Average gradient
- 3.8 %
- Start altitude
- 461 m
- Road
- Departmental road
- Surface
- Paved throughout
- Steepest 500 m
- 9.7 %
- Hardest 2 km
- 6.6 %
- Hardest kilometre
- km 6 · 7.6%
- Above 8%
- 1.4 km (11% of the climb)
- Difficulty index
- 1.1 Easy
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 | 56 min | 13.5 km/h |
| 3.0 W/kg — 210 W | 40 min | 18.6 km/h |
| 4.0 W/kg — 280 W | 33 min | 23.0 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 | 2.1 % | 482 m |
| 2 | 1.8 % | 500 m |
| 3 | 1.9 % | 518 m |
| 4 | 5.4 % | 572 m |
| 5 | 5.6 % | 628 m |
| 6 | 7.6 % | 704 m |
| 7 | 2.6 % | 730 m |
| 8 | 4.9 % | 779 m |
| 9 | -2.2 % | 758 m |
| 10 | 1.1 % | 769 m |
| 11 | 3.9 % | 808 m |
| 12 | 0.9 % | 818 m |
| 13 (partial) | 4.1 % | 841 m |
Download the GPX track All climbs of this col
The other climbs of this col
- From Thônes 6.1 km · 3.4 %
Frequently asked questions
How long is the climb to Col du Marais?
The hardest climb of Col du Marais, from Marlens (Val de Chaise), is 12.6 km long for 478 m of ascent, i.e. 3.8% average.
What is the steepest part of Col du Marais?
The steepest 500 m sits at 9.7%, and the hardest kilometre is the 6th, at 7.6%.
How long does it take to climb Col du Marais from Marlens (Val de Chaise)?
Col du Marais from Marlens (Val de Chaise) takes about 40 min at 3.0 W/kg, i.e. 18.6 km/h on average. The page gives three levels and their assumptions.
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