Park in the small car park in the village of Gannedel. Before setting off, you’ll see a restored farmhouse dating from the 17th century near the car park.
(S/E) Head south along the departmental footpath, passing between the two small rows of palisades. The path is a mown track through the fields. It is marked with totem poles featuring a blue zone indicating the water level in winter.
(1) Ignore the turn-off to the left for the dairy farm and carry on straight ahead.
(2) Cross the footbridge over the marshes and enjoy the view from the SOUTH observation point, on your right as you cross the footbridge. The blue line indicates the water level in winter. Then turn left twice to join a track suitable for vehicles.
(3) Turn right, then veer right again as you leave the track.
(4) Take a sharp right-hand bend. The route then runs alongside the old branch of the Vilaine, where major works have altered its course. The Penfao rock was cut through in 1780, significantly changing life in the marshes. You should come to a small bridge spanning one of the marshes’ many watercourses.
(5) Cross it and carry on straight ahead, heading north.
(6) About forty metres before a T-junction, turn right. The path becomes wooded again here
(7) Near the hamlet of La Carterais, you’ll find a lovely little fountain by the stream. Carry on straight ahead to reach the car park. But first, you’ll have the chance to enjoy the NORTH observation point (S/E).