Col des Brosses from Brussieu
Col des Brosses from Brussieu: 12.6 km at 4.6% average and 578 m of climbing, up to 867 m.
- Distance
- 12.6 km
- Elevation gain
- 578 m
- Elevation loss
- 34 m
- Average gradient
- 4.6 %
- Start altitude
- 325 m
- Road
- Minor road
- Surface
- Paved throughout
- Steepest 500 m
- 10.1 %
- Hardest 2 km
- 7.6 %
- Hardest kilometre
- km 2 · 8.4%
- Above 8%
- 2.0 km (16% of the climb)
- Difficulty index
- 2.3 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 | 1h04 | 11.8 km/h |
| 3.0 W/kg — 210 W | 45 min | 16.7 km/h |
| 4.0 W/kg — 280 W | 36 min | 20.9 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 | 4.1 % | 366 m |
| 2 | 8.4 % | 450 m |
| 3 | 0.1 % | 451 m |
| 4 | 3.2 % | 483 m |
| 5 | 6.3 % | 546 m |
| 6 | 2.2 % | 568 m |
| 7 | 1.8 % | 586 m |
| 8 | 4.2 % | 628 m |
| 9 | 8.1 % | 709 m |
| 10 | 6.9 % | 778 m |
| 11 | 3.5 % | 813 m |
| 12 | 2.7 % | 839 m |
| 13 (partial) | 4.6 % | 869 m |
Download the GPX track All climbs of this col
The other climbs of this col
- From Saint-Laurent-de-Vaux (Vaugneray) 8.1 km · 5.8 %
- From Courzieu 13.1 km · 4.9 %
- From Sainte-Foy-l'Argentière 10.4 km · 4.6 %
Frequently asked questions
How long is the climb to Col des Brosses?
The hardest climb of Col des Brosses, from Brussieu, is 12.6 km long for 578 m of ascent, i.e. 4.6% average.
What is the steepest part of Col des Brosses?
The steepest 500 m sits at 10.1%, and the hardest kilometre is the 2th, at 8.4%.
How long does it take to climb Col des Brosses from Brussieu?
Col des Brosses from Brussieu takes about 45 min at 3.0 W/kg, i.e. 16.7 km/h on average. The page gives three levels and their assumptions.
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