A 3-day walk in the heart of the Mercantour National Park between the sedimentary valleys of L'Ubaye and Haut-Var. A geological journey on the mythical Route des Grands Alpes.
Departure : Bayasse refuge.
Arrival : Bayasse refuge.
From Barcelonette, head towards Col de la Cayolle, Nice(D902).
From Nice, head towards Digne (N202), then Col de la Cayolle via Guillaumes (D2202).
Parking : Bayasse refuge carpark.