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Routes
Road cycling routes
France
Pays de la Loire
Saint-Nazaire
Pontchâteau

The Blue Hole – Bretesche Castle loop from Pontchâteau

Routes
Road cycling routes
France
Pays de la Loire
Saint-Nazaire
Pontchâteau

The Blue Hole – Bretesche Castle loop from Pontchâteau

Moderate

9

riders

The Blue Hole – Bretesche Castle loop from Pontchâteau

04:30

103km

470m

Road cycling

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: August 25, 2026

Tips

The surface for a segment of your route may not be suitable

Some segments of your route comprise a surface that may not be suitable for your chosen sport.

After 31.2 km for 98 m

Waypoints

A

Start point

Train Station

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1

31.2 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

2

32.8 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

3

38.4 km

This small church is actually an extension of a 14th-century chapel, which is believed to be the current sacristy. The church in its present form was reportedly completed in 1606 …

Translated by Google •

Tip by

4

91.0 km

Bretesche Castle

Highlight • Castle

Former residence of the Barons of La Roche Bernard and center of Protestantism. The castle impresses with its romantic and fairytale side. Only the courtyard is open to the public (the interior of the castle is not accessible).

Translated by Google •

Tip by

B

103 km

End point

Train Station

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Way Types & Surfaces

Way Types

85.6 km

10.8 km

3.66 km

2.85 km

152 m

< 100 m

< 100 m

Surfaces

70.7 km

32.2 km

133 m

< 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

Thursday 5 November

14°C

4°C

13 %

Additional weather tips

Max wind speed: 7.0 km/h

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

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