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Arzal Dam – Old Port of La Roche-Bernard loop from Billiers

Routes

Mountain biking trails

Arzal Dam – Old Port of La Roche-Bernard loop from Billiers

Moderate

4.8

(9)

riders

Arzal Dam – Old Port of La Roche-Bernard loop from Billiers

03:40

49.2km

460m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: March 27, 2026

Tips

Includes segments that go up or down a series of steps

You may need to carry your bike.

After 29.7 km for 8 m

After 29.8 km for 42 m

Waypoints

Start point

Parking

Get Directions

13.7 km

Arzal Dam

Highlight • Monument

The Arzal dam is built on the Vilaine estuary between Arzal and Camoël. It is the largest estuary dam in Europe. It is 500 meters long and has a sea …

Translated by Google •

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18.1 km

Very nice path

Highlight • Other

21.0 km

Vilaine Riverside

Highlight • River

24.7 km

Villaine Valley

Highlight • River

Very nice passage despite the luggage on our gravels. A beautiful trail.

Translated by Google •

Tip by

27.5 km

Old Port of La Roche-Bernard

Highlight • Settlement

The stones, weathered by time, and the steep alleyways tell the story of this "Small Town of Character," born of the sea and maritime trade. Clinging to the banks of …

Translated by Google •

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34.1 km

Gaillard Footbridge

Highlight • Bridge

GR349 crossing point

Translated by Google •

Tip by

49.2 km

End point

Parking

Way Types & Surfaces

Way Types

25.8 km

10.4 km

4.46 km

4.43 km

3.39 km

729 m

< 100 m

Surfaces

19.7 km

10.4 km

6.85 km

5.58 km

5.32 km

1.28 km

Elevation

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

Weather

Friday 29 May

27°C

16°C

0 %

Additional weather tips

Max wind speed: 18.0 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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Arzal Dam – Old Port of La Roche-Bernard loop from Billiers

03:40h

49.2km

460m

Arzal Dam – Old Port of La Roche-Bernard loop from Billiers

Arzal Dam

Very nice path

Vilaine Riverside

Villaine Valley

Old Port of La Roche-Bernard

Gaillard Footbridge

Nearby routes

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