BOUCLE CIRCUIT DE L'AGRION DE MERCURE
LA CHAPELLE-HEULIN
Exit the port of Montru, follow the road to the left and turn left to reach the marsh.
Exit the port of Montru, follow the road to the left and turn left to reach the marsh.
This walk of 12 km starts at the lakeside in Mamers and goes through part of the valley where protected species of anemones and or