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

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

(9)

riders

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

05:00

64.4km

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: September 3, 2026

Tips

Includes a segment in which cycling is not permitted

After 40.4 km for 221 m

Waypoints

Start point

Bus stop

Get Directions

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.😅

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Tip by

6.92 km

Tunnel Under the Road

Highlight • Bridge

Small passage under the road, nice work

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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.

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19.4 km

Oudon Keep

Highlight • Castle

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

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31.8 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 …

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Tip by

49.4 km

La Gilardière

Highlight (Segment) • Trail

Nice path well practicable

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Tip by

64.4 km

End point

Bus stop

Way Types & Surfaces

Way Types

19.9 km

19.7 km

17.2 km

4.08 km

1.88 km

1.65 km

< 100 m

Surfaces

17.7 km

15.9 km

11.9 km

9.87 km

8.82 km

324 m

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)

Weather

Tuesday 20 October

15°C

10°C

34 %

Additional weather tips

Max wind speed: 26.0 km/h

to get more detailed weather forecasts along your route

Comments

September 7, 2025,VTT # Mauves-sur-Loire, Le Cellier... 2

Already completed in 2022, this route has everything for mountain bike enthusiasts: highly technical climbs and descents, over scree, rocks, and roots, long singletrack, explosive ascents, portage, etc.
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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