Parking is available at the side of the Route du Filtre.
(S/E) Head north on Route du Filtre and climb steeply to the left, towards the south-west, along the ridge.
The path climbs straight up, past some ruined sheepfolds, until you reach the summit of Xoldoko Gaina.
(1) At the T-junction, turn left towards the south onto the track that descends to the Col d'Osin (Osingo Lepoa).
(2) At Osingo Lepoa, follow the track on the left that descends to the Col des Poiriers (Pitare).
(3) At Pitare, turn left onto the track that descends towards Lake Ibardin.
(4) At the inverted Y-junction, turn left towards the west and follow the lake to the dam.
(5) Continue northwards along the hillside until you reach a fork.
(6) Take the path on the left, continuing along the hillside, walking on the stones that protect the pipe leading from the lake to the filter, until you reach another fork (elevation 227).
(7) Turn left onto the path that climbs back up to the car park (S/E).