When you arrive in Duerne, park in the car park at the bottom of the village, near the Saint-Martin-en-Haut and Yzeron crossroads.
(S/E) Walk up through the village to the Aveize/Sainte-Foy-l'Argentière/La Chapelle sur Coise junction.
Follow the signs for La Chapelle-sur-Coise and, immediately after, turn right onto Montée de Fourvière, then continue along the dirt track that extends from it. Stay on this track, ignoring the two paths on the left and the four on the right, until you reach the crossroads.
(1) Turn left downhill towards Chemin de Fargère, ignoring the road on the right.
(2) At the fork, turn right onto Chemin de Fargère, heading towards Chemin du Terron, which continues on from there. Pass the houses and continue downhill until you reach the crossroads.
(3) Leave the tarmac road and turn left, following the edge of the forest at first, then entering it, still following this path which continues in the open towards Chemin du Layat du Haut.
(4) At the bottom of this path, turn right onto Route de la Chapelle, then take thesecond left onto Chemin du Puits and continue to the next fork.
(5) Ignore Chemin du Picotin on the left and take Chemin des Bessies on the left a few metres further on. Continue until you reach a sharp right-hand bend.
(6) At this point, leave the tarmac road and take the path towards Le Birieux (signposted). At Le Birieux, keep left.
(7) After the hamlet, go down the path towards the forest, ignoring the path on the left and the path on the right in the forest. Go up the open section towards Chemin d'Ardaison. Take the tarmac road again until you reach the crossroads.
(8) Turn left towards La Prat and Chemin de Clavagny. Almost at the end of this road and before the last house, turn right to go up towards Duerne.
(9) On Route de Saint-Martin, keep left and immediately leave this road, heading down towards Chemin du Pontel. Cross the housing estates and head back up via Impasse de la Caserne. On Route de Bordeaux, turn right towards the car park (S/E).
Note: the 10 km pass easily on a gravel bike, note: reliable GPX file for tracking.