The Nantes-Brest Canal is navigable free of charge from April to October. Along 364 km between Nantes and Port Launay, the canal has 237 locks.

  • Between Nantes and Redon

17 locks
88.40 km
Draught: 1.20m on the Erdre and the canalised section
Clearance: 3.80m on the Erdre and 3.00m on the canalised section

  • Between Redon and Guerlédan

91 locks
117.80 km
Draught: 1.40 m
Anchorage: 1.40m
Maximum speed: 8km/h (5km/h between locks 55 and 107)
Clearance for normal top water level: 3m

  • Between Pontivy and the dam of Guerlédan

> non-navigable section

  • Between the Lake of Guerlédan and the double locks of Coat Natous

10 locks
26 km
Draught: 1.10m
Clearance: 3.20m

  • Between the double locks of Coat Natous and the lock of Goariva

> non-navigable section

  • Between the lock of Goariva and Port-Launay

46 locks
84 km
Draught: 1.10 m on the canalised part and 3.20 m between Guily Glaz and Châteaulin.
Clearance: 3.20m

For more information: Canaux de Bretagne