Plan your visit
Lac de Guerlédan is one of France’s great natural sites — bring good shoes and a camera. Locate it on the map, book a room nearby in a click, or add it to your travel list to build your itinerary.
About Lac de Guerlédan
The largest lake in Brittany, the Lac de Guerlédan is a long, sinuous reservoir created in the 1920s when a dam was raised across the river Blavet, drowning a stretch of the Nantes-to-Brest canal. Deep green and hemmed in by the wooded Gorges of the Daoulas and the mysterious Quénécan forest, it is a magnet for swimmers, sailors, kayakers and paddleboarders, with beaches and watersports bases along its shores. Walking and cycling trails follow the old towpaths and the lake's edge, passing former lock-keepers' houses. Every few decades the reservoir is drained for dam maintenance, briefly revealing the ghostly canal and forge ruins beneath — a rare spectacle that draws crowds from across Brittany.