Isère: cycling cols
13 cols, each with the distance, ascent and gradient of every climb, derived from the OpenStreetMap road network.
Where they are
Hardest first
| Col | Altitude | Main climb | Distance | Gain | Loss | Gradient | Difficulty | Climbs |
|---|---|---|---|---|---|---|---|---|
| Col de Chamrousse | 1,800 m | Depuis Séchilienne | 18.2 km | 1,417 m | — | 7.8 % | 11.8 Very hard | 3 |
| Col du Coq | 1,434 m | Depuis Saint-Nazaire-les-Eymes | 13.9 km | 1,168 m | — | 8.4 % | 10.3 Hard | 2 |
| Alpe d'Huez | 1,860 m | Depuis Le Bourg-d'Oisans | 13.2 km | 1,091 m | — | 8.3 % | 9.8 Hard | 2 |
| Col de Sarenne | 1,999 m | Depuis Le Bourg-d'Oisans | 20.8 km | 1,388 m | 116 m | 6.7 % | 8.8 Hard | 2 |
| Col de Palaquit | 1,154 m | Depuis Meylan | 12.1 km | 959 m | — | 7.9 % | 7.6 Sustained | 3 |
| Col de Chalimont | 1,365 m | Depuis Choranche | 25.1 km | 1,449 m | 344 m | 5.8 % | 5.2 Sustained | 2 |
| Col de la Machine | 1,011 m | Depuis Saint-Jean-en-Royans | 12.4 km | 868 m | 75 m | 7.0 % | 5.1 Sustained | 3 |
| Col de Porte | 1,326 m | Depuis Saint-Laurent-du-Pont | 16.5 km | 1,029 m | 158 m | 6.2 % | 4.9 Moderate | 2 |
| Col de Menée | 1,457 m | Depuis Treschenu-Creyers (Châtillon-en-Diois) | 15.2 km | 836 m | 20 m | 5.5 % | 4.8 Moderate | 2 |
| Col des Mille Martyrs | 884 m | Depuis Saint-Bueil | 7.5 km | 548 m | — | 7.3 % | 4.0 Moderate | 2 |
| Col de Pressembois | 570 m | Depuis Gières | 3.5 km | 340 m | — | 9.7 % | 3.2 Moderate | 2 |
| Col de Parménie | 578 m | Depuis Tullins | 5.3 km | 399 m | — | 7.5 % | 3.0 Moderate | 2 |
| Villard-de-Lans | 1,026 m | Depuis Pont-en-Royans | 24.7 km | 1,254 m | 428 m | 5.1 % | 2.8 Moderate | 2 |
Scroll the table sideways to see every column.
Ranked by the FIETS index of the main climb — the same index each page prints, with its formula.
How this index is calculated
FIETS index: Δaltitude² / (10 × distance) + max(0, summit altitude − 1,000) / 1,000, lengths in metres. How this index works (article in French)
Neighbouring departments
- Drôme 9 cols documented
- Savoie 35 cols documented
- Hautes-Alpes 14 cols documented
- Ain 7 cols documented
The nearest published departments, measured as the crow flies between the cols themselves.
Collect the cols you ride
Sleipnir recognises the cols you cross from the GPS trace of your rides: the col ticks itself off the day you ride over it.
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