Departure from Col de Bleine (car park at the side of the road).
(S/E) Start at marker 104 and take the small tarmac road that climbs east-northeast.
(1) At marker 105, follow the path on the right (yellow markings) under magnificent fir trees to the forest track.
(2) Follow the forest track to the right (small sign on the right indicating "Gréoliere").
(3) After about 300m (be careful), at the end of a left-hand bend, the footpath continues on the right (it is not well signposted but is clearly marked on the ground by numerous footsteps). Follow this path eastwards.
(4) At the DFCI water tank with a large white H, continue straight ahead (east) and follow the path that climbs to Pic de l'Aiglo (yellow markings).
(5) From Pic de l'Aiglo, continue east then north-east along a path that alternates between ascents and descents, passing through fir forests, pine forests and pastures. Numerous cairns mark this path in addition to the yellow markings.
(6) At marker 103, follow the path on the right and continue east-northeast towards Gréoliére les Neiges.
The final ascent of Pic de Fourneuby is via a single path (yellow markings). Be careful of the cliffs on your left, especially if you are afraid of heights. Reach the summit marked by a large cairn.
(7) The return journey follows the same path to the DFCI cistern, passing through the intermediate points again.
(4) At the cistern, for a change, take the path on the right (north then west-northwest) to reach a track.
(8) Follow the forest track on the left (west) and rejoin a fork taken on the way out.
(3) Continue down the forest track.
(2) Turn left (west) and find marker 105.
(1) Follow the small tarmac road to the car park (S/E).