Park at the Batellerie car park in Montmerle-sur-Saône.
(S/E) Go up Rue de la Foire, cross the D933 and continue on Rue Papier. Turn left, walk along the wall surrounding the Château d'Avencourt and take the Montée des Minimes on the right.
(1) At the Chapelle des Minimes, take the time to visit the site (chapel, panorama, tower) before continuing opposite on Chemin de la Chapelle to the roundabout decorated with a wine press. Take the road on the right, then turn left onto Chemin d'Adam.
(2) Cross the D933 with caution and take the path opposite to the Rivaux houses. Take thefirst road on the left and turn left again onto the D17b. Walk along a pond and ignore the road that branches off to the right.
(3) At the Sept Chemins crossroads, cross the D88 with caution, take Impasse de la Garenne and continue straight ahead on the aptly named Chemin des Sables. Walk carefully along the left-hand side of the D17 for about 20 metres before crossing it to take the path that leads into the woods.
(4) At the crossroads, turn right. Continue along the road opposite and, before Moulin Crozet, turn left.
(5) Cross the Callonne via the Passerelle des Charmes footbridge. Join a road.
(6) Climb up the road opposite, which winds its way up to the houses. Continue straight ahead, walking alongside the wall surrounding the Château de Charmes.
(7) At the Croix du Paradis (viewpoint on stilts, orientation table), turn left onto the paved path of the same name. Continue downhill on the path opposite, which leads to the Calonne valley. Follow the valley to the right. Continue on the road to the centre of Guéreins. Take thesecond street on the right.
(8) In the bend, near a car park on the left, go up the street along the wall. Continue right on the D933, cross it in front of the church and go down Rue du Simond on the left to the river.
(9) At the Saône, take the towpath on the left for 3.8 km, passing under the D17 bridge and facing Île de Montmerle. When you see Pont de Montmerle, turn left after Parc de la Batellerie to reach the car park (S/E).