(S/E) Park at the edge of the railway embankment, right next to the bridge crossing the access road to the Branducas Valley. Walk up the road that runs alongside the railway line until you reach the bridge that crosses over it and leads to Branducas.
(1) On the other side of the tracks, follow the winding road through the village, initially ignoring a road on the left and then another on the right. The village consists of a succession of farmhouses with tall façades, which you pass one after the other until you reach a three-way junction.
(2) Leaving to your right the usual features of Breton farmsteads (oven, fountain, etc.) – which the locals here seem to take particular care of – take the left-hand path and continue up through the village via a more recently built area. Turn onto the first path on the left, cross the field behind the houses, then turn right onto a long cross-path. Follow it to the hamlet known as Le Rossignol, where you’ll come to a road. Turn right and you’ll soon reach the village of Catiho.
(3) Turn left before reaching the centre of the village, opposite the bus shelter. Follow the small road for about a hundred metres, then turn right onto the first path you come to. This path, which leads to the marshes along the Brivet, makes two sharp bends to the left before a path branches off to the right. Follow it whilst walking alongside the high-voltage power line that cuts across the landscape. Don’t miss: there’s a huge stork’s nest on one of the pylons.
The path skirts a group of meadows on the right, running parallel to the river’s bend. Turn right before the fourth left-hand bend to reach the footbridge that takes you across the river.
(4) When you reach the opposite bank, turn right to walk alongside the river. You’ll stay on the riverbank until you’re back near Catiho, just past the Tremblaie marshes. As you go, pass the first path on the left which heads up towards the village of My. Then, after skirting a higher embankment, the river makes a fairly tight right-left turn as it winds its way between the hills of Catiho and Tinfois.
(5) Directly opposite the hill on the other side, a path branches off to the left, heading up towards My. This is the path you should take if the water level in the Tremblaie marshes prevents you from continuing along the bank of the Brivet.
If possible, carry on straight ahead and pass the next bend to the right, where the track climbs slightly. Leave the riverbank and climb the embankment to reach the hilltop, where you’ll find a farm track that leads to the Champ Blanc
(6) When you reach this track, turn right and follow it for two and a half kilometres. It winds its way through farmland and marshy meadows, beneath a beautiful canopy of trees. As you pass the Balasson marshes, ignore the three tracks on your left that lead up towards the village of the same name.
(7) When this track meets another crossing it, turn right to reach the river and the footbridge that takes you across the canal running parallel to it.
Follow the river upstream for six hundred metres before reaching the bridge at Branducas.
(8) Cross the Brivet a second time and turn left as the path climbs. Continue straight on for about 600 metres, passing two paths branching off to the right, then take the third path as it descends towards the marshes, level with the footbridge you crossed earlier, on the opposite bank.
Walk a few hundred metres before reaching the village of Vallée de Branducas.
(9) At the central junction, turn left and follow the small road uphill until you pass under the railway bridge. The start is a few metres further on, on the right (S/E).