Col des Brosses from Courzieu
Col des Brosses from Courzieu: 13.1 km at 4.9% average and 638 m of climbing, up to 867 m.
- Distance
- 13.1 km
- Elevation gain
- 638 m
- Elevation loss
- 60 m
- Average gradient
- 4.9 %
- Start altitude
- 291 m
- Road
- Minor departmental road
- Surface
- Paved throughout
- Steepest 500 m
- 13.6 %
- Hardest 2 km
- 10.3 %
- Hardest kilometre
- km 6 · 12.2%
- Above 8%
- 2.6 km (20% of the climb)
- Difficulty index
- 2.6 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 | 1h10 | 11.3 km/h |
| 3.0 W/kg — 210 W | 49 min | 16.0 km/h |
| 4.0 W/kg — 280 W | 39 min | 20.2 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 | 3.3 % | 324 m |
| 2 | 3.8 % | 362 m |
| 3 | 4.3 % | 404 m |
| 4 | 8.3 % | 487 m |
| 5 | 8.3 % | 570 m |
| 6 | 12.2 % | 692 m |
| 7 | 4.8 % | 740 m |
| 8 | 5.7 % | 797 m |
| 9 | -1.2 % | 785 m |
| 10 | -3.4 % | 752 m |
| 11 | 3.3 % | 784 m |
| 12 | 5.7 % | 841 m |
| 13 | 2.7 % | 868 m |
| 14 (partial) | 0.6 % | 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 Brussieu 12.6 km · 4.6 %
- 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 Courzieu, is 13.1 km long for 638 m of ascent, i.e. 4.9% average.
What is the steepest part of Col des Brosses?
The steepest 500 m sits at 13.6%, and the hardest kilometre is the 6th, at 12.2%.
How long does it take to climb Col des Brosses from Courzieu?
Col des Brosses from Courzieu takes about 49 min at 3.0 W/kg, i.e. 16.0 km/h on average. The page gives three levels and their assumptions.
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