Col de la Croix de Fer
24.0 km at 5.2%, summit at 2,067 m. HC.
- Length
- 24.0 km
- Average gradient
- 5.2%
- Height gained
- 1,248 m
- Summit
- 2,067 m
- Steepest km
- 11.1% measured on the route
- Category
- HC
The climb
Col de la Croix de Fer climbs 24.0 km at an average of 5.2%, gaining 1,248 m to a summit at 2,067 m. The average hides a lot: the kilometres swing widely either side of it, so the climb is a sequence of ramps and easier stretches rather than a constant effort.
The hardest kilometre measures 9.7% and comes in the opening third of the climb, and 7 kilometres of the ascent average more than 8%.
Above 2,000 m the air is thin enough to matter: a rider who has not been at altitude loses power over the top of a climb like this regardless of how well it has been paced. In ProPace's stage data it appears on the single stage listed below.
Stages that climbed it
| Stage | Date | Summit at | Category |
|---|---|---|---|
| Tour de France 2026, stage 20: Le Bourg d'Oisans → Alpe d'Huez | 25 July 2026 | km 34.0 | HC |
Stages since 2024 whose route climbed to this summit, matched on ProPace's route data. Category as listed for that stage where the roadbook data is in the app.
In ProPace you ride the whole stage, this climb included, against a pro reference in the real wind from the day. How the simulation works is set out in How much slower than a pro are you?
Ride the stages over Col de la Croix de Fer against a pro in ProPace. Free on iOS.
