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

Bike touring routes & trails

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

Hard

4.7

(34)

272

riders

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

05:09

81.6km

580m

Cycling

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

Last updated: August 27, 2026

Waypoints

Start point

Bus stop

Get Directions

18.6 km

Guernal lock on the Nantes-Brest canal

Highlight • Other

The Guernal lock is located in the town of Neulliac. It was built around the 1800s and is accompanied by several buildings (houses, stores, bridges over locks) whose restoration has not been completed.

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20.9 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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32.5 km

Stumo lock on the Nantes-Brest canal

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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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36.3 km

Poulhibet lock - Canal de Nantes à Brest

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NB: This lock is equipped with public dry toilets and a mechanical repair station for self-service bicycles, pump, tools, frame rack, etc. In addition, the beverage dispenser also contains spare inner tubes!

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40.0 km

Guerlédan Lock - Nantes to Brest Canal

Highlight • Monument

Last locks before reaching the barrage

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54.8 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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59.8 km

Gouarec Lock on the Nantes–Brest Canal

Highlight • Structure

Between the Lac de Guerlédan and the double lock of Coat Natous in its section of the Côtes d´Armor, the Canal from Nantes to Brest is navigable upstream of the …

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63.4 km

Plélauff lock on the Nantes–Brest Canal

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One of the many locks on the canal near the village of Pléalauff. Just after, the bridge allowing you to cross the canal and reach the wash house. All on the Vélodyssée route.

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81.6 km

End point

Bus stop

Way Types & Surfaces

Way Types

46.4 km

30.7 km

3.90 km

500 m

< 100 m

Surfaces

46.4 km

25.5 km

9.69 km

< 100 m

Elevation

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

Highest point (270 m)

Lowest point (60 m)

Weather

Sunday 8 November

14°C

6°C

19 %

Additional weather tips

Expect light wind and shifting conditions.

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Comments

August 25, 2024,2024.36 TdF FR; V6, EV1: Rostrenen - Pontivy

First a few thoughts about yesterday, day 35 of our trip, the first day we didn't get on our bikes. It rained heavily until the afternoon. Luckily we were allowed to stay a second night with our Servas/Warmshowers host Francoise. That was very good! Thank you! It gave us the opportunity to replace the mudguards' support struts at Andreas'. The …

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