From the Refuge des Merveilles to L'Authion via the Pas du Diable

The start of this hike is at the Refuge des Merveilles.

(S) From the Refuge des Merveilles, go around the rocks heading south to rejoin the^GR®®52.

Red and white^GR®®52markings

(1) From there, stay on the^GR®®52, climb up to the Lac Fourca dam, follow its eastern shore and gradually climb up towards Lac du Trem. Pass the Lac de la Muta dam, continue above the lake and arrive at Lac du Diable.

(2) Heading due south and still on the^GR®®52, you will reach the Pas du Diable, a small pass between Mont Macruera on the left and the Cime du Diable on the right.

(3) In a chaotic and very rocky landscape, begin a long descent. The trail has been rebuilt after some minor damage caused by Storm Alex. (Remarkable work by^{the GR®®} trail markers).

(4) Source du Caîros. Climb slightly as you approach Baisse Cavaline.
(5) From Baisse Cavaline, stay on the^GR®®52and walk to Col de Raus.

(6) Stay on the^GR®®52and continue the descent towards the Baisse de Saint-Véran.
(7) With Fort de la Redoute in your sights, climb the long steep path to marker 410.
(8) At marker 410, leave the^GR®®52, head for the Authion barracks and then quickly reach the Authion car park at the foot of the Monument to the Memory of the Marine Fusiliers. (E)

Good mountain boots.
No water on the route.

• Refuge des Merveilles.
• The Vallée des Merveilles.
• Mount Bégo.
• Lac Long Supérieur.
• Fourca Lake.
• Lac du Trem.
• Lake Muta.
• Devil's Lake.
• Devil's Pass.
• The Devil's Peak (2,685 m).
• Mont Capelet Supérieur (2,598 m).
• Baisse Cavaline.
• Raus Pass.
• Saint Véran Pass.
• La Redoute.
• L'Authion.