Start from the car park above Lac des Plagnes, at the end of the road from Abondance.
Signposts are located at all important points, and the entire circuit of the lake in an anti-clockwise direction ((1)-(2)-(1)) is signposted "Tour du Lac des Plagnes".
(S) From the car park, walk down the road for a few dozen metres. Just before a small chapel, turn left. Go past a red and white barrier for motor vehicles and you will reach the lake.
(1) Continue straight ahead on the dyke. At the end, turn left and continue along the lake. At a fork, take the path on the right which leaves the shore and climbs slightly.
(2) At another fork, take the path on the right towards Cubourré. Climb up the hillside and cross a stream on a wooden footbridge at the bottom of a waterfall. Then turn right and climb up the winding path with the waterfall on your right. You will come out onto an alpine track.
(3) Turn right, cross the stream and pass the chalet on your right. Go around a wetland (an old filled-in lake) on the right and follow the mountain track to a large boulder with information panels.
(4) Retrace your steps back to Cubourré.
(3) After crossing the stream, turn left towards the lake. Take the winding path along the waterfall, cross the stream again and return to the fork.
(2) Turn right and continue around the lake. Cross the stream again via a footbridge. Continue through the woods and, when you reach the chalets, turn left to reach the lake shore. Follow the shore to the corner of the dyke.
(1) Turn right to reach the road and then right again to return to the car park.