4.8
(61)
4,340
riders
04:55
70.4km
2,410m
Road cycling
Challenge yourself on the difficult 43.8-mile road cycling loop to Col de la Croix de Fer from Saint-Jean-de-Maurienne, with 7899 feet of cl
Last updated: February 26, 2026
Waypoints
Start point
Parking
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10.7 km
Highlight (Segment) • Climb
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18.3 km
Highlight • Rest Area
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38.5 km
Highlight • Mountain Pass
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41.5 km
Highlight • Mountain Pass
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63.8 km
Highlight (Segment) • Other
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70.4 km
End point
Parking
Way Types & Surfaces
Way Types
69.8 km
381 m
245 m
< 100 m
< 100 m
Surfaces
69.6 km
534 m
245 m
< 100 m
< 100 m
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Elevation
Highest point (2,060 m)
Lowest point (460 m)
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Weather
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Tuesday 7 July
32°C
19°C
0 %
Additional weather tips
Max wind speed: 10.0 km/h
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This route was planned by komoot.
This is a difficult road cycling route, classified as 'hors catégorie' (HC) due to its significant elevation gain and challenging gradients. The climb features a 'rollercoaster' profile with steep sections reaching up to 9-10.5%, interspersed with flatter parts and even short descents, making it hard to maintain a consistent rhythm. It's a demanding ride best suited for experienced cyclists.
The loop offers several notable points. You'll encounter the famous Montvernier Hairpins early on. Further up, you'll pass the Col du Glandon, which is very close to the main climb. The highlight of the route is reaching the summit of Col de la Croix de Fer itself, marked by its iconic iron cross. There's also a Great view over the needles of arves to enjoy.
The loop starts and ends in Saint-Jean-de-Maurienne. You should be able to find parking within the town, which serves as a common starting point for cyclists tackling this iconic climb. Specific parking areas are not detailed, but general town parking would be your best bet.
Yes, there is at least one known water source. You can find Drinking Water at the Cemetery, which can be a convenient stop to refill your bottles.
The best time to cycle the Col de la Croix de Fer loop is typically from late spring to early autumn, generally June through September. During these months, the mountain passes are usually clear of snow, and the weather conditions are most favorable for cycling in the Alps. Always check local weather and road conditions before you go.
No, you do not need any special permits or have to pay entrance fees to cycle the Col de la Croix de Fer loop. It's a public road, freely accessible to cyclists.
This route is a road cycling loop. While dogs are generally allowed in public spaces, bringing a dog on a demanding road cycling route like this, especially one with significant climbs and descents, is not typically recommended for the dog's safety or comfort. If you must bring a dog, ensure it is safely secured in a bike trailer designed for pets and consider the strenuous nature of the ride.
The scenery is breathtaking and diverse. You'll start in forested sections, then open up into the Arves Valley. As you climb, you'll be treated to panoramic views of surrounding peaks, including the legendary Aiguilles d'Arves and the Pic de l'Etendard. Picturesque villages, waterfalls from melting snow, and classic Alpine hairpins characterize the route, especially after Saint-Sorlin-d'Arves. Near the summit, the landscape becomes more open with meadows.
This challenging loop typically takes around 4 hours and 54 minutes to complete, based on an average cycling pace. However, your actual duration will depend on your fitness level, the number of stops you make, and weather conditions.
Yes, this route is part of the iconic "Route des Grandes Alpes® by bike" and also overlaps significantly with the "Circuit Glandon / Croix-de-Fer" (74% of the route). You'll also find sections that coincide with "Traversée du Mollard" (21%) and other local paths.
Yes, the climb includes several challenging sections. The initial kilometers from Saint-Jean-de-Maurienne, particularly up to the crossroads for La Toussuire, feature steep ramps of up to 9%. Further along, after a short descent, you'll encounter a section of over five kilometers averaging almost 9%. The final kilometers, especially after the Saint-Sorlin-d'Arves ski station, are known for classic Alpine hairpins and steep ramps.
Comments
Descent from the Col …
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A little apprehensive about the descent of the Glandon which I had found dangerous by car, but in the end it is better done by bike!
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