Lake Vert – Thorrenc Viaduct loop from Saint-Romain-d'Ay
Lake Vert – Thorrenc Viaduct loop from Saint-Romain-d'Ay
14
riders
Lake Vert – Thorrenc Viaduct loop from Saint-Romain-d'Ay
05:16
55.8km
1,370m
Mountain biking
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is right next to a parking lot.
Last updated: August 23, 2026
Tips
Includes a segment that may be dangerous
A part of this route comprises technical, difficult, or hazardous terrain. Specialist equipment and prior experience may be required.
After 9.22 km for 649 m
Waypoints
Start point
Parking
14.7 km
Lake Vert
Highlight • Lake
Translated by Google •
Tip by
15.2 km
Lac de Vert
Lake
15.5 km
Lake Vert
Highlight • Lake
Translated by Google •
Tip by
21.4 km
Old Railway Tunnel and Gorge View
Highlight • Gorge
22.7 km
Thorrenc Viaduct
Highlight • Bridge
Translated by Google •
Tip by
22.8 km
Thorrenc Castle
Highlight • Other
Translated by Google •
Tip by
30.3 km
The Madonna
Highlight • Other
55.8 km
End point
Parking
Way Types & Surfaces
Way Types
30.4 km
15.1 km
6.60 km
1.98 km
1.54 km
132 m
< 100 m
Surfaces
29.6 km
19.1 km
5.15 km
674 m
487 m
406 m
364 m
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Highest point (460 m)
Lowest point (150 m)
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Sign up for freeWeather
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Saturday 10 October
15°C
7°C
0 %
Additional weather tips
Max wind speed: 13.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
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