Tunnel Under the Road – Oudon Keep loop from Saint-Mars-du-Désert
Tunnel Under the Road – Oudon Keep loop from Saint-Mars-du-Désert
4.6
(10)
70
riders
Tunnel Under the Road – Oudon Keep loop from Saint-Mars-du-Désert
05:00
63.2km
780m
Mountain biking
Hard mountain bike ride. 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 accessible with public transport.
Last updated: July 11, 2026
Tips
Includes a segment that is highly dangerous
A part of this route comprises highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.
After 42.3 km for 41 m
Waypoints
Start point
Bus stop
Get Directions
4.53 km
Launay
Highlight (Segment) • Other
Translated by Google •
Tip by
6.90 km
Tunnel Under the Road
Highlight • Bridge
Translated by Google •
Tip by
14.9 km
Ruisseau du Refou
Highlight • River
Translated by Google •
Tip by
19.5 km
Oudon Keep
Highlight • Castle
Translated by Google •
Tip by
32.0 km
Les Mazères
Highlight (Segment) • Settlement
38.2 km
Descent to the Port
Highlight (Segment) • Trail
Inevitably in the other direction it …
Translated by Google •
Tip by
49.8 km
La Gilardière
Highlight (Segment) • Trail
Translated by Google •
Tip by
63.2 km
End point
Bus stop
Way Types & Surfaces
Way Types
21.9 km
19.0 km
16.9 km
3.82 km
1.39 km
152 m
Surfaces
17.4 km
14.9 km
11.7 km
9.63 km
8.63 km
904 m
< 100 m
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Elevation
Highest point (80 m)
Lowest point (0 m)
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Weather
Powered by Foreca
Monday 31 August
24°C
13°C
0 %
Additional weather tips
Max wind speed: 7.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Comments
However, don't approach this ride lightly; it's only 36 km long, but it's quite explosive with little respite.
Basically, be prepared, and you'll have a lot of fun despite the difficulty.
In …
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