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Col du Grand Colombier
From Anglefort. Length and gradient from an official source; times from the climb time calculator.
- Start
- Anglefort
- 289 m
- Length
- 15.3 km
- Average gradient
- 8%
- Max gradient
- 13%
- Elevation gain
- 1,209 m
- Summit
- 1,498 m
Source: Route des Grandes Alpes, checked 16 October 2026.
North-east side from Anglefort; RGA says it joins the Culoz route from about the ninth km. Summit 1,498 m; the sign at the col says 1,501 m (noted by RGA).
Time at your watts
| W/kg | Power | Time | Speed | VAM |
|---|---|---|---|---|
| 2.0 | 140 W | 2:00:19 | 7.6 km/h | 608 m/h |
| 2.5 | 175 W | 1:36:59 | 9.5 km/h | 755 m/h |
| 3.0 | 210 W | 1:21:32 | 11.3 km/h | 898 m/h |
| 3.5 | 245 W | 1:10:35 | 13.0 km/h | 1,037 m/h |
| 4.0 | 280 W | 1:02:27 | 14.7 km/h | 1,172 m/h |
| 5.0 | 350 W | 51:10 | 17.9 km/h | 1,431 m/h |
| 6.0 | 420 W | 43:47 | 21.0 km/h | 1,672 m/h |
Model estimate in calm air at steady power (Martin et al. 1998). 70 kg rider + 8 kg bike, tops position (CdA 0.358), Crr 0.0032, 15 °C, air density at the climb's mid-elevation. Mid-elevation 894 m (air density 1.102 kg/m³). Calculate yours / All climbs
Climb time calculator (prefilled) / All famous climbs