This curved section of the famous Nantes-Brest canal lets you discover the richness of the banks of the Blavet, which flows into the Lorient estuary in Morbihan. You can see that its bed is mainly artificial, and that its course is regulated by an ingenious system of locks.
Slightly to the north of Mûr-de-Bretagne, the Guerlédan dam abruptly interrupts its course, thus giving birth to the largest artificial lake in Brittany, the Lac de Guerlédan. The gravelly surface is pleasant for both touring bikes, gravel and even road bikes.
I am personally charmed by the melody of the tires on the gravel, so this portion is conducive to meditation and relaxation for me. A real moment of vacation!