Climbs › Col de l’Iseran
Savoie · France · HC
Col de l’Iseran indoors
From Bonneval-sur-Arc to 2,765 m: 13.3 km and 987 m of climbing on your smart trainer, in 3D with real terrain. Often closed by snow in winter – indoors it is open all year.
Elevation profile and data
under 4 %4–7 %7–10 %over 10 %per 500 m
How long does Col de l’Iseran take?
Estimated times at steady power, 75 kg rider, 9 kg bike, no wind or drafting – computed with the same physics as the app.
| W/kg | Watts | Time | avg km/h |
|---|---|---|---|
| 2.0 | 150 W | 1:37:02 | 8.2 |
| 2.5 | 188 W | 1:18:30 | 10.2 |
| 3.0 | 225 W | 1:06:13 | 12.1 |
| 3.5 | 263 W | 57:29 | 13.9 |
| 4.0 | 300 W | 50:59 | 15.7 |
| 5.0 | 375 W | 41:57 | 19.0 |
Time calculator
About Col de l’Iseran
The Col de l’Iseran (2764 m) is the highest paved pass in the Alps. From Bonneval-sur-Arc the road crosses a barren high valley; at the top the thin air is noticeable.
In rampida you ride the route exactly as it lies on the road: the gradient reaches your trainer metre by metre, the scenery is built from real elevation data and OpenStreetMap. A pacer group can pull you along, and next time you race your own ghost.
Embed this elevation profile on your website
For clubs, blogs and travel sites – free, please keep the link below.
<iframe src="https://rampida.com/embed/col-de-l-iseran.html" width="100%" height="300" style="border:0" loading="lazy" title="Elevation profile Col de l’Iseran from Bonneval-sur-Arc"></iframe>
<p><a href="https://rampida.com/en/climbs/col-de-l-iseran.html">Elevation profile Col de l’Iseran from Bonneval-sur-Arc – rampida</a></p>How to ride Col de l’Iseran indoors
- Open the appOpen rampida in Chrome or Edge and create a free account.
- Pair your trainerConnect your smart trainer or power meter under “Devices”.
- Choose Col de l’IseranDownload the GPX file and open it in the app under “Load GPX / FIT”.
More climbs in France
- Alpe d’Huezfrom Le Bourg-d’Oisans · 14.9 km · 1,125 m · avg 7.4 %
- Mont Ventouxfrom Bédoin · 21.3 km · 1,605 m · avg 7.5 %
- Col du Tourmaletfrom Luz-Saint-Sauveur · 18.5 km · 1,433 m · avg 7.6 %
- Col du Galibierfrom Valloire · 18.1 km · 1,241 m · avg 6.8 %
- Col du Télégraphefrom Saint-Michel-de-Maurienne · 12.6 km · 853 m · avg 6.5 %
- Col de la Madeleinefrom La Chambre · 19.6 km · 1,524 m · avg 7.8 %
- Col de la Croix de Ferfrom Saint-Jean-de-Maurienne · 27.2 km · 1,639 m · avg 5.5 %
- Col d’Izoardfrom Briançon · 19.6 km · 1,211 m · avg 5.4 %
- Cime de la Bonettefrom Jausiers · 24.0 km · 1,651 m · avg 6.8 %
FAQ
How long and how steep is Col de l’Iseran from Bonneval-sur-Arc?
The climb is 13.3 km long with 987 m of climbing, from 1,790 m to 2,765 m. The average gradient is 7.3 %, the steepest kilometre 10.2 %.
How long does Col de l’Iseran take?
At 3 W/kg (225 W, 75 kg rider) about 1:06:13, at 4 W/kg about 50:59 – steady power, no wind. Use the calculator on this page for your own numbers.
Can I ride Col de l’Iseran on a smart trainer?
Yes. Download the GPX file, open it in rampida (“Load GPX / FIT”) and ride it in 3D with real terrain. Your FTMS smart trainer follows the gradient. It runs in Chrome or Edge, no install.
What does it cost?
During the open beta until 31 March 2027 riding is free and unlimited with a free account. Afterwards 50 km per month stay free.