Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: January 25, 2026

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Waypoints

Start point

Train Station

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35.3 km

Lock No. 138 of Bon Repos

Highlight • Bridge

The 18th century canal lock has been shaped like a medieval bridge fitting to the old Abby, with a hostel in the old canal keeper's house, and a café on the opposite side from the Abby.

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35.5 km

Former abbey now in ruins. Interesting place, in the immediate vicinity of the canal, but plan to cross if you want to approach the abbey because it is located on the opposite bank to the Vélodyssée track.

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49.9 km

Guerlédan Lock - Nantes to Brest Canal

Highlight • Monument

Last locks before reaching the barrage

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57.3 km

Stumo lock on the Nantes-Brest canal

Highlight • Other

The locks at this location with the keeper's house midstream were probably also serving as a mill to harness the water power from the main Blavet river channel.

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68.9 km

Cascade Lock

Highlight • Bridge

Just before arriving in Pontivy the river Blavet crashes down a wide cascade, while the canal is channelled left through a lock. Pedestrians and bikers can cross the narrow metal …

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78.9 km

Locks 79 to 87 - Around Saint-Gérand

Highlight (Segment) • Other

Sequence of nine locks, seven of which are very close to each other. Boat traffic must have been very slow on this section…

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119 km

Josselin Castle

Highlight • Religious Site

The castle's imposing towers are reflected in the River Oust. Owned by the Rohan family, one of the oldest families in Brittany, it is the symbol of this pretty town. …

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119 km

Château de Josselin seen from the Sainte-Croix bridge

Highlight • Castle

Erected at the beginning of the 11th century, the Château de Josselin was once just a simple wooden building. Rebuilt and extended over the centuries, it was modernized by the …

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160 km

End point

Train Station

Way Types & Surfaces

Way Types

73.7 km

40.4 km

38.9 km

4.23 km

2.84 km

< 100 m

Surfaces

87.0 km

38.0 km

29.2 km

4.13 km

1.81 km

Elevation

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

Highest point (210 m)

Lowest point (30 m)

Weather

Wednesday 4 March

16°C

7°C

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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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Lock No. 138 of Bon Repos – Cascade Lock loop from Loudéac

Lock No. 138 of Bon Repos

Bon-Repos Abbey

Guerlédan Lock - Nantes to Brest Canal

Stumo lock on the Nantes-Brest canal

Cascade Lock

Locks 79 to 87 - Around Saint-Gérand

Josselin Castle

Château de Josselin seen from the Sainte-Croix bridge

Nearby routes

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