Starting point: Thilay church square.
(S/E) From the church, head down Rue Eva Thomé, then turn left onto Rue de la Motte to reach the war memorial.
(1) Turn right onto the Transsemoisienne, pass the former Thilay railway station – now a ‘boule en bois’ court – then continue along the Semoy greenway to the former Naux railway station.
(2) Head left uphill until you approach the Moulin de la Gire. Cross the Gire via the bridge, then head uphill opposite to reach an old cart track overlooking the Semoy. As you approach the Ruisseau de Nantanru, head down to the right to reach the confluence of the Nantanru and Semoy.
(3) Turn left back onto the Transsemoisienne route until you reach a path on the right. Take this path to reach the Nohan bridge.
(4) Cross the Semoy and, on the other side, head left, then climb immediately to the right up the embankment. After the short climb, the well-marked path leads to the old Chemin de Nohan.
(5) Turn right and, taking the first path on the right, head down towards Naux.
(6) Turn left onto the departmental road for 50 metres, then head left up the Chemin de Gespunsart to reach a crossroads at elevation 223.
(7) Turn right and follow a wide track to the hamlet of Narbruay.
(8) Leave the track and take a path on the left leading to the Narbruay Stream. Cross the stream, head uphill, then turn right onto the Chemin de Bozin to reach the RD131. Head down towards the bridge and return to the church square in Thilay (S/E).