Alpe d'Huez
13.8 km at 8.1%, summit at 1,850 m. HC.
- Length
- 13.8 km
- Average gradient
- 8.1%
- Height gained
- 1,118 m
- Summit
- 1,850 m
- Steepest km
- 11.0% measured on the route
- Category
- HC
The climb
Alpe d'Huez climbs 13.8 km at an average of 8.1%, gaining 1,118 m to a summit at 1,850 m. It is an unusually even climb — the per-kilometre gradients cluster tightly around the average, so what the number says is what the road does.
The hardest kilometre measures 9.3% and comes in the opening third of the climb, and 7 kilometres of the ascent average more than 8%. The final kilometre eases to 5.5%, which is where the climb gives something back.
At this height altitude starts to take a measurable edge off sustained power. It appears on 2 stages in ProPace's data, all in 2026; each one is listed below and can be ridden in the app.
Stages that climbed it
| Stage | Date | Summit at | Category |
|---|---|---|---|
| Tour de France 2026, stage 19: Gap → Alpe d'Huez | 24 July 2026 | km 129.4 | HC |
| Tour de France 2026, stage 20: Le Bourg d'Oisans → Alpe d'Huez | 25 July 2026 | km 171.6 | not listed |
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 Alpe d'Huez against a pro in ProPace. Free on iOS.
