(Start/Finish) As you leave the car park, note the Hosannière cross. Head towards Rue de la Croix and turn right onto Chemin de la Gelousière. At the Y-junction, follow Chemin de la Gelousière to the right. After the farmhouse on the left-hand side, there is a spring on that same side, near an old farm shed.
Follow the Chemin de la Genousière, uphill and then along flat ground on the plateau, until you reach the junction with Rue du Plan d’Eau (the D122). There is a wayside cross on the left-hand side, just beyond the junction. Cross the junction carefully and head straight on until you reach the next road nearby.
(1) Turn left and carefully follow the road heading west until you reach a Fork in the road. Turn left onto the road leading to the hamlet of La Genête. The road, running along the edge of the plateau, overlooks the hamlet of Boisne further to the west, on the other side of a small valley through which flows an intermittent stream, the Musson, which feeds the Cherveux–Saint-Christophe lake. Just as the road takes a sharp left-hand bend near the hamlet, continue straight ahead onto a path heading south which, further on, descends from the plateau to the bottom of the valley.
(2) Cross the Musson via a footbridge and begin climbing up the western slope of the valley. Soon, take a path on the right that runs along the slope: the Chemin du Musson. You’ll see the Boisne washhouse. Pass through a small dip in the terrain and follow the path climbing the western slope of the main valley to reach Boisne on the plateau.
Cross the hamlet by heading straight on along the edge of the plateau via the Route de la Carte, then the Route du Patrouillet. Towards the end of the hamlet, the road turns sharply left.
(3) Immediately after the bend, take the road on the right, known as the Chemin du Paradis, which continues northwards. Carry on to a T-junction.
Turn onto the left-hand path, which climbs uphill and shortly afterwards joins a road known as the Rue du Puits au Breuil. Turn right onto it and follow it through the hamlet to the T-junction with the Rue du Breuil.
Be careful to keep the Impasse de la Burgalière on your right as you enter the village. Turn left onto Rue du Breuil and continue to the nearby junction with the road known as Chemin du Taulis.
(4) Turn right onto Chemin du Taulis and, at the next junction, take the left-hand track towards the locality known as La Bâtonnière. Walk along the left-hand side of the hamlet and, a little further on, turn left onto a track and then immediately right onto another track heading north.
At the junction with Chemin du Frêne, continue straight ahead along the track, which is circular and heads towards the hamlet known as La Péchellerie, where it joins a small road. Take this road carefully to the right. At the T-junction, take the road on the right for a few metres until you find, on the left, the track leading to the Lavoir de la Perdillière on the banks of the Musson.
(5) Return to the nearby crossroads and continue straight ahead towards the hamlet of La Quairie. Just before you reach it, as the road bends to the right, take the path opposite which heads south-east and leads straight to the hamlet of Le Plantis. You’ll come out onto the road serving this hamlet; follow it to the right for about forty metres.
(6) Turn left downhill towards a small valley, then climb up and pass close to the hamlet known as La Bernière on your right before reaching the D122 road at Chazais. Turn left and follow the road for about thirty metres before taking the Chemin du Lavoir on the right. Continue straight on to the covered washhouse at Chazais, following the path that continues from the road.
(7) Head back towards Chazais and turn left onto Chemin de la Selle. Before reaching the road known as Chemin de la Galinière, take the farm track on the left which heads south-east, flanked by two low stone walls at the start. The track descends into a valley before climbing partly up the other side of the valley
(8) Just before reaching the road leading to the hamlet of La Selle to the east and the hamlet of Le Peu to the south. Look out for the fortified farm of Maillé in the distance on the plain. Take the path on the right, which descends and joins the Route de la Grue. When you reach the road, follow it carefully to the left as it climbs up the side of the valley. Further on, the road takes a right-angle bend to the left and heads towards the hamlet of Le Peu. At this point, continue straight on along a path that curves gently to form a semicircle to the right.
After this wide circular route to the right, the path descends towards the valley to the east of Saint-Christophe-sur-Roc, where the Ruisseau de la Roche flows. There are lovely views of the village and the church. After passing through the bottom of the valley, the path joins the road known as the Chemin de la Roche. Follow it, turning to the right. The road climbs. At the bottom of a steep slope, take the path on the left which leads, after a few dozen metres, to the source of the Ruisseau de la Roche and its underground river (see the ‘During the walk’ section).
Return to the road and take the steep slope on the left, then turn left again and take the Chemin de la Fontaine on the left, which seems to pass through the storage area of a metalworks factory. Continue to the end of the path to see the covered wash house and the source of the Ruisseau de la Roche.
(9) Head back up towards the village. At the top of the Chemin de la Fontaine, you’ll find the car park on your left (S/E).