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

Download GPX

Save

Move start point

Edit route

Navigate

Send to Phone

Waypoints

Start point

Train Station

Get Directions

16.2 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…

Translated by Google •

Tip by

31.7 km

Guerlédan Lock - Nantes to Brest Canal

Highlight • Monument

Last locks before reaching the barrage

Tip by

35.4 km

Poulhibet lock - Canal de Nantes à Brest

Highlight • Other

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!

Translated by Google •

Tip by

39.2 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.

Tip by

48.6 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.

Translated by Google •

Tip by

50.8 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 …

Tip by

88.5 km

Cadoret Lock

Highlight • Structure

Beautiful lock on the Nantes-Brest canal

Translated by Google •

Tip by

92.3 km

La Tertraie Lock

Highlight • Structure

Saint-Mélec chapel to see a little further north

Translated by Google •

Tip by

125 km

End point

Train Station

Way Types & Surfaces

Way Types

63.8 km

32.4 km

21.3 km

3.97 km

3.28 km

< 100 m

Surfaces

67.9 km

31.0 km

21.1 km

3.29 km

1.50 km

Elevation

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

Weather

Wednesday 4 March

16°C

7°C

-- %

Additional weather tips

Max wind speed: -- km/h

to get more detailed weather forecasts along your route

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

Nearby routes

Moderate

4.8

From Château Josselin through the Vallée d'Oust — loop

02:00h

32.0km

320m

Hard

The V8 along the Blavet — loop from Pontivy

03:07h

49.4km

510m

Moderate

4.8

540

Cadoret Lock – Josselin Castle loop from Saint-Gérand

04:54h

80.6km

260m

Moderate

4.6

458

Canal de Nantes à Brest – Cascade Lock loop from Neulliac

02:18h

37.0km

150m

Moderate

4.7

305

La Tertraie Lock – Cadoret Lock loop from Écluse du Rouvray

02:23h

41.3km

90m

Hard

4.9

173

Bon-Repos Abbey – Lock No. 138 of Bon Repos loop from Bon Repos sur Blavet

03:25h

52.9km

350m

Moderate

4.7

263

Ècluse de Kervégan – Ville Pérot lock loop from Saint-Maudan

02:30h

38.5km

210m

Hard

4.9

181

Josselin Castle – Montertelot Lock loop from Pleugriffet

07:16h

118km

500m

Hard

4.9

205

Cascade Lock – Cadoret Lock loop from Loudéac

07:31h

125km

580m

Moderate

4.7

167

Cascade Lock – Ville Pérot lock loop from Saint-Caradec

04:01h

65.0km

450m

Moderate

4.8

446

Rohan – Cadoret Lock loop from Pleugriffet

04:37h

74.1km

380m

Moderate

4.6

430

Canal de Nantes à Brest – Cascade Lock loop from Pontivy

02:21h

38.8km

160m

Cascade Lock – Cadoret Lock loop from Loudéac

Locks 79 to 87 - Around Saint-Gérand

Guerlédan Lock - Nantes to Brest Canal

Poulhibet lock - Canal de Nantes à Brest

Stumo lock on the Nantes-Brest canal

Guernal lock on the Nantes-Brest canal

Cascade Lock

Cadoret Lock

La Tertraie Lock

Nearby routes

Sign up or log in to keep exploring this route

We value your privacy ⛰️

We value your privacy ⛰️