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Col de la Madeleine
From La Chambre. Length and gradient from an official source; times from the climb time calculator.
- Start
- La Chambre
- 472 m
- Length
- 19.3 km
- Average gradient
- 8%
- Max gradient
- 9.5%
- Elevation gain
- 1,521 m
- Summit
- 1,993 m
Source: Route des Grandes Alpes, checked 14 October 2026.
South side, direct route from La Chambre (not via Montgellafrey).
Time at your watts
| W/kg | Power | Time | Speed | VAM |
|---|---|---|---|---|
| 2.0 | 140 W | 2:31:41 | 7.6 km/h | 609 m/h |
| 2.5 | 175 W | 2:02:14 | 9.5 km/h | 756 m/h |
| 3.0 | 210 W | 1:42:44 | 11.3 km/h | 899 m/h |
| 3.5 | 245 W | 1:28:54 | 13.0 km/h | 1,039 m/h |
| 4.0 | 280 W | 1:18:37 | 14.7 km/h | 1,175 m/h |
| 5.0 | 350 W | 1:04:23 | 18.0 km/h | 1,434 m/h |
| 6.0 | 420 W | 55:03 | 21.0 km/h | 1,678 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 1,232 m (air density 1.058 kg/m³). Calculate yours / All climbs
Climb time calculator (prefilled) / All famous climbs