La Poste car park in Châteaubourg.
(S/E) Head towards the SNCF station and go up to the left towards the footbridge over the tracks. Cross it towards “Boulevard de la Liberté” and follow it to the left until the first junction.
(1) Turn left onto Rue de la Croix Guillemet and follow it to Rue du Plessis Beucher. Turn left into the cul-de-sac.
(2) At the first bend, continue along the small path that runs straight past the house. Walk past the water treatment plant and follow the path along the edge of the woods.
(3) At the end of the path, head up towards La Godinière. Follow the tarmac road for about 100 metres until you reach, still on the left, the small forest path that leads onto the road at a place called Le Pont Riou.
(4) Follow the road to the left, pass Le Moulin de Pont Riou, cross the Vilaine and, after the houses, turn left towards the hamlet of Vau Bouttier. Continue straight on until you reach a bridge that takes you under the railway line.
(5) Cross the railway and continue along the Chemin de la Guèrinais, turning left at every junction.
(6) At the end, on the small square, turn left onto the path leading to the footbridge over the Vilaine. Follow the path running alongside the grounds of the Hôtel l’Ar Milin and join the small road on the right that runs alongside the railway line. Cross Parc Bel Air to the car park where you started (S/E).