Car park at the former Saint-Rivalain railway station near the Blavet.
Yellow signposting
(S/E) From the car park, head back up to the road to cross the railway line; you’ll see Saint-Rivalain station on your right. This railway line is still used for freight transport between Auray and Pontivy. Turn right onto a wide path overlooking the railway line, which curves to the left to reach the entrance to the village of Talhouët Kerdec.
(1) Turn right, walk through this hamlet (with its beautiful stone house) and continue along the small road. At the next junction, turn right towards the hamlet of Kergouav.
(2) Turn right onto a wide farm track that runs alongside livestock buildings. Continue straight on downhill (lovely view of the Blavet valley and the villages on the other side). Go round a small wood and join a road.
(3) Follow this road to the right and cross the railway line a second time.
(4) Turn left onto a small path that runs alongside the railway line and reach a footbridge that takes you over a stream, passing under the railway line. Continue along this path at the edge of the field.
(5) At the signpost, turn left to head up into a small wood and reach a stream that once powered a mill (the path at this point is not shown on the IGN map).
(6) At the signpost marked ‘Route des écureuils’, turn left and follow the stream. Cross a wetland area via some basic footpaths and continue along the wide, south-east-facing path.
(7) When you can see the bell tower of Saint-Barthélemy, near a shed, veer left then right and cross the hamlet of Le Resto to reach a small road.
Unmarked
(8) Follow this road to the right, then keep right at the first three-way junction. Continue along this small road for about 2.4 km, passing two roads on your right. Pass near the Talhouët mill, now converted into a residential property. Cross the railway line and arrive at the towpath at the Talhouët lock, with its micro power station.
(9) Follow the towpath to the right for about 2.1 km.
(10) Pass the Tréblavet lock and continue along the towpath for a further 1.2 km before reaching the car park where you started (S/E).