From Eaux Rousses the route follows the ancient trail leading to the hunting lodge of Orvieille, going ahead to the alpine summer pasture lying above it, for about two-hour walk.
A brochure gives you the opportunity to know something more about the 11 stop points situated along the trail, from the red ferruginous spring of Eaux Rousses to the creation of the ancient dry stone walls, from the conifer woods to the glacial morphology of the valley, from the "pioneer" plants covering the most extreme environments to the ancient hunting lodge of Orvieille. The route ends in one of the most beautiful panoramic points of the Park, from which it is possible to see the whole Gran Paradiso massif, from Gran Nomenon to Tresenta.