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Routes
Mountain biking trails
France
Pays de la Loire
Saint-Nazaire
Prinquiau

The Blue Hole – Mabille Valley Lake loop from Prinquiau

Routes
Mountain biking trails
France
Pays de la Loire
Saint-Nazaire
Prinquiau

The Blue Hole – Mabille Valley Lake loop from Prinquiau

Moderate

11

riders

The Blue Hole – Mabille Valley Lake loop from Prinquiau

02:39

40.0km

210m

Mountain biking

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

Last updated: June 20, 2026

Tips

Includes a segment that goes up or down a series of steps

You may need to carry your bike.

After 24.6 km for 15 m

Waypoints

A

Start point

Bus stop

Get Directions

1

5.82 km

La Taillée Semaphore

Highlight • Viewpoint

One of the 5 semaphores on the estuary created by the artist Vincent Mauger. Beautiful view of the meadow and the Taillée canal. Unfortunately positioned too far from the river. …

Translated by Google •

Tip by

2

13.2 km

The Blue Hole

Highlight • Structure

Three old granite quarries, abandoned in 1980, which naturally filled with water to form beautiful blue ponds, popular with fishermen. Many of the cobblestones of Nantes and Nazaire streets come from this place.

Translated by Google •

Tip by

3

15.3 km

The Port House

Highlight • Cafe

This beautiful residence, which currently houses a crêperie, served as a model for the Maison dans la Loire, a work that can be seen in Couëron.
The small port in …

Translated by Google •

Tip by

4

19.9 km

Le Nid d'Observation

Highlight • Other

5

23.3 km

View of the Countryside

Highlight • Viewpoint

6

24.5 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

7

24.5 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

8

37.9 km

Château de l'Escuray

Highlight • Castle

B

40.0 km

End point

Bus stop

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Way Types & Surfaces

Way Types

14.1 km

14.1 km

7.66 km

3.74 km

162 m

< 100 m

Surfaces

14.9 km

10.2 km

5.14 km

4.94 km

3.84 km

828 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

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Wednesday 8 July

38°C

18°C

-- %

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4.4

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Mabille Valley Lake – Creek Downhill/mountain loop from Savenay

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