Lacets de Montvernier Loop
Lacets de Montvernier Loop
4.5
(6)
276
riders
01:48
26.6km
450m
Cycling
The Lacets de Montvernier Loop is a moderate 16.6-mile touring cycling route in the French Alps, famous for its unique hairpin bends and val
Last updated: February 26, 2026
Waypoints
Start point
Parking
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10.6 km
Highlight (Segment) • Other
Tip by
26.6 km
End point
Parking
Way Types & Surfaces
Way Types
24.6 km
1.01 km
772 m
120 m
110 m
< 100 m
Surfaces
24.0 km
2.44 km
165 m
< 100 m
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Elevation
Highest point (770 m)
Lowest point (500 m)
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Weather
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Thursday 7 May
19°C
8°C
43 %
Additional weather tips
Max wind speed: 6.0 km/h
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This route was planned by komoot.
The loop typically starts near the Plan d'eau des Oudins. You can find parking facilities in the vicinity of Pontamafrey or near the lake itself, which serves as a convenient starting point for this cycling adventure.
While direct public transport to the exact trailhead might be limited, you can reach nearby towns in the Maurienne Valley by train or bus. From there, you would likely need to cycle or arrange a local transfer to the starting point of the loop near Pontamafrey.
As this is primarily a road cycling route with narrow sections and traffic, it is generally not recommended for cycling with dogs. The focus is on the challenging climb and descent, which may not be safe or enjoyable for pets.
The best time to cycle this route is typically from late spring to early autumn (May to October). During these months, the weather is generally favorable, and the mountain passes are clear of snow. Cycling in the mornings or on weekends can also help you avoid heavier traffic.
No, there are no specific permits or entrance fees required to cycle the Lacets de Montvernier Loop. The road is publicly accessible.
The Lacets de Montvernier is renowned for its unique engineering and visual appeal. It features 17 or 18 incredibly tight hairpin bends, carved directly into the cliff face, resembling a 'ribbon of road' or 'shoelaces' winding up the mountain. This distinctive construction, combined with its history as a Tour de France climb, makes it a truly memorable ride.
The climb is considered moderate. It has a consistent average gradient of 8.1% to 8.7%, with some sections reaching 10% or even 13%. While sustained, the frequent hairpin bends offer brief moments to ease your pace, making it manageable for intermediate cyclists. The climb itself is relatively short, about 3.4 to 4 kilometers.
As you ascend, you'll be treated to wonderful, sweeping views southeast of the Maurienne Valley. The scenery transitions from lush, tree-lined sections to a more open, panoramic vista from the cliffside. It's a climb designed to be savored for its dramatic beauty.
The primary landmark is the climb itself, the Lacets de Montvernier, with its iconic hairpin bends. The road's inclusion in the Tour de France multiple times also adds to its fame. The engineering feat of its construction between 1928 and 1934 is a point of interest in itself.
Yes, the route intersects with several other well-known paths. You'll find it passes through sections of the Route des Grandes Alpes à vélo, variante Saint-François-Longchamp / Valloire, La Mauriennaise, and the dedicated Lacets de Montvernier trail. It also briefly touches parts of the Col du Chaussy route for those looking to extend their ride.
The road surface on the Lacets de Montvernier is generally smooth tarmac. However, it is quite narrow, especially on the hairpin bends, so cyclists should remain vigilant.
Many cyclists suggest that this is a climb to be savored for its incredible views rather than rushed. The frequent hairpin bends offer natural opportunities to momentarily ease your pace and take in the stunning Maurienne Valley panorama. Focus on a steady rhythm and enjoy the unique experience.