(S/E) Leave Sourdon via Rue Carnot (yellow signposts); at the wayside cross, turn right.
(1) Turn right onto a path. Pass close to the cemetery and reach Ainval. Cross the hamlet, passing close to the little church.
(2) Head up to the left towards Coullemelle. Walk alongside the Bois Fermé, then pass Septoutre on your left.
(3) Turn right onto a dirt track running alongside the Bois des Sorbiers, then turn right into the Bois de Saint-Pierre. Further on, you’ll reach a crossroads.
(4) Turn right, then left, and walk through the village of Esclainvillers.
(5) When you reach the church, turn right down a narrow lane, then onto a dirt track. Cross the Vaquette valley, then the Saint-Firmin ditch.
(6) Turn right along the edge of the woodland and continue to a junction.
(7) Turn left, then right; pass close to the Saint-Aubin chapel, then turn left to head back up towards Sourdon (S/E).