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Routes
France
Pays de la Loire
Nantes
Couëron

Mabille Valley Lake – Our Lady of Bongarant loop from Couëron

Routes
France
Pays de la Loire
Nantes
Couëron

Mabille Valley Lake – Our Lady of Bongarant loop from Couëron

Hard

5.0

(1)

8

riders

Mabille Valley Lake – Our Lady of Bongarant loop from Couëron

05:11

79.6km

580m

Gravel riding

Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route. The starting point of the route is accessible with public transport.

Last updated: April 11, 2026

Tips

Includes a segment in which cycling is not permitted

After 38.5 km for 184 m

Waypoints

A

Start point

Train Station

Get Directions

1

8.35 km

Château de la Juliennais

Highlight • Castle

The Château de la Juliennais dates from the 15th century, but the building in its current form was built in 1860. Located on the GR3.
Very pleasant setting, with woods, …

Translated by Google •

Tip by

2

22.1 km

The port of Cordemais is a blatant manifestation of the town's deep attachment to its estuary. Redeveloped in 2008, the site now offers more pitches and an ecological fairing area, …

Translated by Google •

Tip by

3

22.2 km

Port of Cordemais

Highlight • Structure

Very relaxing, quiet place, ideal for a stopover (especially the nearby guiguette)

Translated by Google •

Tip by

4

22.7 km

Cordemais Estuary Observatory

Highlight • Viewpoint

This observatory offers a clear view of the Cordemais channel, the Loire, the "Maison Cheminée" (Chimney House), and the magnificent coal-fired power station. A pleasant walk through the wetland area is also available. There are also picnic tables.

Translated by Google •

Tip by

34.8 km

Ruins

Ruins

39.1 km

Lac de la Vallée Mabile

Lake

7

39.9 km

Lac de Savenay

Highlight • Lake

This lake is otherwise called the Mabille valley lake. It is an artificial lake.

Access to the leisure center is free. The activities offered here are: picnic on the bank, play areas for the youngest, fishing.

Translated by Google •

Tip by

8

39.9 km

Mabille Valley Lake

Highlight • Other

The Lac de la Vallée Mabille, or Lac de Savenay, is a beautiful artificial reservoir that is worth a detour. By bike, you can easily go around the southern part …

Translated by Google •

Tip by

9

72.1 km

Our Lady of Bongarant

Highlight • Other

Pretty chapel from the beginning of the 15th century in a very Breton style.

Translated by Google •

Tip by

10

72.1 km

Bongarant Chapel

Highlight • Other

Legend has it that in the 15th century the Duke of Brittany François II encountered a wild boar while hunting and fell. He then vowed to build a chapel if he escaped death. It did.

Translated by Google •

Tip by

B

79.6 km

End point

Train Station

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Way Types & Surfaces

Way Types

42.7 km

20.7 km

10.6 km

5.52 km

191 m

Surfaces

28.5 km

28.4 km

16.4 km

4.91 km

1.33 km

< 100 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 (90 m)

Lowest point (0 m)

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Weather

Powered by Foreca

Saturday 11 July

39°C

23°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

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