Col du Grand Colombier from Culoz-Béon
Col du Grand Colombier from Culoz-Béon: 17.2 km at 7.4% average and 1,265 m of climbing, up to 1,498 m.
- Distance
- 17.2 km
- Elevation gain
- 1,265 m
- Elevation loss
- 34 m
- Average gradient
- 7.4 %
- Start altitude
- 264 m
- Road
- Minor departmental road
- Surface
- Paved throughout
- Steepest 500 m
- 19.5 %
- Hardest 2 km
- 11.5 %
- Hardest kilometre
- km 6 · 10.9%
- Above 8%
- 6.8 km (40% of the climb)
- Difficulty index
- 9.3 Hard
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 | 2h09 | 8.0 km/h |
| 3.0 W/kg — 210 W | 1h28 | 11.8 km/h |
| 4.0 W/kg — 280 W | 1h08 | 15.3 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 | 7.6 % | 340 m |
| 2 | 10.1 % | 441 m |
| 3 | 8.5 % | 526 m |
| 4 | 5.9 % | 585 m |
| 5 | 10.6 % | 690 m |
| 6 | 10.9 % | 799 m |
| 7 | 7.6 % | 875 m |
| 8 | 1.8 % | 893 m |
| 9 | 7.4 % | 967 m |
| 10 | 8.9 % | 1,056 m |
| 11 | 10.0 % | 1,156 m |
| 12 | 6.5 % | 1,221 m |
| 13 | 6.0 % | 1,281 m |
| 14 | 1.3 % | 1,293 m |
| 15 | 7.1 % | 1,364 m |
| 16 | 4.5 % | 1,409 m |
| 17 | 7.3 % | 1,481 m |
| 18 (partial) | 7.6 % | 1,496 m |
Download the GPX track All climbs of this col
The other climbs of this col
- From Anglefort 14.6 km · 8.1 %
- From Virieu-le-Petit (Arvière-en-Valromey) 9.1 km · 10.1 %
Frequently asked questions
How long is the climb to Col du Grand Colombier?
The hardest climb of Col du Grand Colombier, from Culoz-Béon, is 17.2 km long for 1,265 m of ascent, i.e. 7.4% average.
How long does it take to climb Col du Grand Colombier from Culoz-Béon?
Col du Grand Colombier from Culoz-Béon takes about 1h28 at 3.0 W/kg, i.e. 11.8 km/h on average. The page gives three levels and their assumptions.
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