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To start the walk, head to Brégier-Cordon (the village centre), away from the country road that follows the Rhône water supply canal; turn to pass in front of the church and continue for 100 metres to park in the car park by the tennis courts and the village hall.
(S/E) Head towards the mountain (alongside the wash house) to take a good path that climbs to the left, heading north.
Pass a water reservoir and continue the climb up the hillside. Halfway up the slope, leave this path – which levels out – and turn right onto a steeper path. This takes you over a few limestone outcrops and leads to a first viewpoint over the Rhône valley before reaching a plateau and a track accessible to vehicles coming from the right (GR®® de Pays Tour du Pays de Lhuis et d’Izieu).
(1) Take this level track to the left for 500 metres, then veer left to stay close to the edge of the plateau and reach a clearing with a viewpoint equipped with a bench.
Continue along this path, which descends steeply; then, at the bottom of the descent, veer to the right and, after a short climb, resume the descent towards the Gland valley. Join a forest track coming from the left; follow it for a few metres on level ground until you reach the start of a path at a place called La Frache.
(2) Do not miss this path starting on the left, which takes you directly down to the Gland via a fairly steep slope that may be damp and slippery. This will take you to the bank of the stream.
Follow the left bank of the stream downstream along a pleasant, easy path. When it can no longer follow the water’s edge, the path climbs slightly to the left, passing in front of the entrance to the Glandieu Cave, then returns to a position above the Gland and the structures along it.
Stay on higher ground until you reach the area above the village, before descending a steep slope which leads out onto the road between some houses.
(3) Turn right to admire the waterfall 150 metres away, then return to the road heading south until you reach Chemin des Grenouilles; take this on the right, heading west. Continue straight on along Chemin de la Morte until you reach the road. The marsh trail starts just before this.
(4) Take this path on the left, which runs alongside the road on your right before turning left and heading into the wooded marsh. At the fork, continue left until you reach the edge of the lake created in a former gravel pit. Turn left onto the Route du Plan d’Eau, pass the visitor centre and arrive at a fork.
(5) Turn right and follow the path through a wooded section, then across fields, where it turns sharply left and reaches a fork about a hundred metres from the D19.
(6) Turn left, then veer right to climb a slope, leaving the wetland behind and reaching an alluvial agricultural terrace.
(7) Turn left towards the east and pass close to some large, closed sheds. The path becomes Route du Vieux Four, which leads back to the main town. Cross Rue de la Mairie straight ahead (take care) to pass in front of the church, then turn right onto Chemin de Lélinaz to reach the starting car park. (S/E).
The highlights are obviously the beautiful Gland River at the end of the descent and the magnificent Glandieu waterfall. I couldn't return via my marshes, but the signposting for this hike is very good and easy to follow.
Visorando Member
Difficult 
