Col du Grand Ballon from Willer-sur-Thur
Col du Grand Ballon from Willer-sur-Thur: 14.9 km at 6.3% average and 944 m of climbing, up to 1,343 m.
- Distance
- 14.9 km
- Elevation gain
- 944 m
- Average gradient
- 6.3 %
- Start altitude
- 398 m
- Road
- Minor departmental road
- Surface
- 0.2 km unpaved
- Steepest 500 m
- 9.9 %
- Hardest 2 km
- 8.3 %
- Hardest kilometre
- km 13 · 8.2%
- Above 8%
- 4.6 km (31% of the climb)
- Difficulty index
- 6.3 Sustained
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 | 1h38 | 9.1 km/h |
| 3.0 W/kg — 210 W | 1h07 | 13.3 km/h |
| 4.0 W/kg — 280 W | 52 min | 17.1 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 | 3.0 % | 428 m |
| 2 | 6.1 % | 489 m |
| 3 | 5.7 % | 546 m |
| 4 | 6.3 % | 609 m |
| 5 | 5.3 % | 663 m |
| 6 | 4.2 % | 705 m |
| 7 | 6.7 % | 772 m |
| 8 | 5.2 % | 823 m |
| 9 | 6.1 % | 885 m |
| 10 | 7.4 % | 959 m |
| 11 | 7.3 % | 1,032 m |
| 12 | 8.1 % | 1,112 m |
| 13 | 8.2 % | 1,194 m |
| 14 | 7.5 % | 1,269 m |
| 15 (partial) | 7.9 % | 1,343 m |
Download the GPX track All climbs of this col
The other climbs of this col
- From Wuenheim 17.5 km · 6.0 %
- From Lautenbach 25.0 km · 4.2 %
Frequently asked questions
How long is the climb to Col du Grand Ballon?
The hardest climb of Col du Grand Ballon, from Willer-sur-Thur, is 14.9 km long for 944 m of ascent, i.e. 6.3% average.
What is the steepest part of Col du Grand Ballon?
The steepest 500 m sits at 9.9%, and the hardest kilometre is the 13th, at 8.2%.
How long does it take to climb Col du Grand Ballon from Willer-sur-Thur?
Col du Grand Ballon from Willer-sur-Thur takes about 1h07 at 3.0 W/kg, i.e. 13.3 km/h on average. The page gives three levels and their assumptions.
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