Departure: Around the Place de l'Église in Port-Launay.
(S/E) With your back to the church square, head towards the war memorial, then turn right onto Quai Amiral Douguet, along the banks of the Aulne, which continues onto Quai Louis Hais.
(1) Just before the viaduct, at a large white building, turn right onto a grassy path, pass a chain and continue along a path that climbs into the woods. Follow this long, steady climb until you reach a small road.
(2) Turn left and continue climbing. At the first three-way junction, turn left to pass through the village of Lanvaïdic, where you will find the small 17th-century Saint-Aubin Chapel.
(3) Continue along a stony path that descends towards a stream and then turns left. It climbs steadily and leads to a small country road.
(4) Opposite a house with wooden shutters, turn left onto the road overlooking the Quimper-Landerneau railway line at Pont Saint-Sébastien. After the bridge, turn right and follow this road. Walk along the right-hand side of the greenhouses of the Kergadalen Agricultural Training Centre.
(5) Continue straight ahead at the crossroads with a carved cross and continue to the hamlet of Saint-Sébastien and its beautiful 16th-century chapel (an ideal place for a break). Make a return trip to the modest fountain located about 100 m below
(6) Continue downhill, passing the farms of Le Rest and Rozavel and the Lézaon equestrian centre.
(7) After passing a solitary conifer on the right, turn right onto a path between fields and head towards the banks of the Aulne.
(8) Turn left at the barrier and follow the path through the reed bed. It leads to the Guily-Glas sea lock.
(9) Continue up the Aulne, pass under the viaduct and follow the outward route to reach the church square (S/E).