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Routes
Mountain biking trails
France
Pays de la Loire
Châteaubriant-Ancenis
Saint-Mars-Du-Désert

Tunnel Under the Road – Oudon Keep loop from Saint-Mars-du-Désert

Routes
Mountain biking trails
France
Pays de la Loire
Châteaubriant-Ancenis
Saint-Mars-Du-Désert

Tunnel Under the Road – Oudon Keep loop from Saint-Mars-du-Désert

Hard

4.6

(11)

72

riders

Tunnel Under the Road – Oudon Keep loop from Saint-Mars-du-Désert

05:01

63.8km

830m

Mountain biking

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. The starting point of the route is accessible with public transport.

Last updated: December 25, 2025

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Tips

Cycling is not permitted along parts of this route

You'll need to dismount and push your bike.

After 19.3 km for 183 m

After 40.6 km for 221 m

After 43.2 km for 302 m

Waypoints

A

Start point

Bus stop

Get Directions

1

4.53 km

Launay

Highlight (Segment) • Other

Flat, quiet and relaxing path. You have to take advantage of it, there aren't many in the area.😅

Translated by Google •

Tip by

2

6.91 km

Tunnel Under the Road

Highlight • Bridge

Small passage under the road, nice work

Translated by Google •

Tip by

3

14.9 km

Ruisseau du Refou

Highlight • River

From La Saulzaie to La Rocherie, the Refou flow offers you a superb ascending and shaded single track.

Translated by Google •

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4

19.5 km

Oudon Keep

Highlight • Castle

A pretty site that is worth the detour for the dungeon and its surroundings (canal, sculptures)

Translated by Google •

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5

32.0 km

Les Mazères

Highlight (Segment) • Settlement

6

38.2 km

Descent to the Port

Highlight (Segment) • Trail

Downhill it can go very fast, it's technical and it beats a little when you let go of the brakes... But it's exhilarating ☺️.
Inevitably in the other direction it …

Translated by Google •

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7

50.3 km

La Gilardière

Highlight (Segment) • Trail

Nice path well practicable

Translated by Google •

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B

63.8 km

End point

Bus stop

Way Types & Surfaces

Way Types

19.8 km

19.1 km

19.0 km

4.42 km

1.26 km

152 m

Surfaces

17.2 km

15.1 km

10.5 km

10.2 km

9.81 km

991 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (80 m)

Lowest point (0 m)

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Weather

Powered by Foreca

Monday 2 March

18°C

4°C

0 %

Additional weather tips

Max wind speed: 13.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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