The Nantes-Brest canal covers 360km and 238 locks, from Nantes to Châteaulin, the last town before entering the harbour at Brest. 


Tamed by treasures of technical ingenuity, the river meanders through the most beautiful valleys in Brittany, from the Erdre to the Aulne, via the Vilaine, the Oust and the Blavet.

The Blavet canal, 57km long and with 28 locks, winds its way down to Lorient harbour. It's a veritable interlude of nature between steep cliffs and hills.

River cruise on the Nantes-Brest canal or the Blavet river

In Pontivy: the Blavet and the Nantes-Brest Canal

Departing from Pontivy, you can choose to sail on the Nantes to Brest canal or the Blavet canal !

Boat rental

Never sailed before? No problem! The boat hire company Brittany Boating will introduce you to navigation before your departure. These fully-equipped houseboats can take you away for a weekend, a week or more!

Direction Nantes

To sail on the Nantes-Brest canal towards Nantes, we recommend that you leave from Rohan. The section between Pontivy and Rohan is not recommended (but possible) because of the large number of locks (no fewer than 52 locks over 24km!).

No crossing between Carhaix and Lac de Guerlédan

It is not possible to navigate between the Lake Guerlédan and Carhaix. If you have your own boat, you can sail the Finistère section of the canal from Port-Launay down to Carhaix.

Blavet Canal

To navigate on the Blavet canal to Lorient harbour, you can leave from Pontivy or St-Nicolas-des-Eaux!

Find all the information you need about navigation here:

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