Hike to the Grenairon Refuge
From the car park, take the track on the left towards the Grenairon Refuge and the Buet. As it climbs, the track becomes a path which you'll continue to follow through the forest. It'll then take you across a first "gully" beneath large flat rocks, before re-entering the forest. At an intersection, ignore the left-hand track to Les Vagnys and take the path on the right, then cross the Nant Sec stream, staying on the path which makes a few more hairpin bends in this pleasant forest. It leaves the forest to reveal the surrounding summits. You'll reach the Grenairon refuge via the ridge that conceals it from view until you've practically arrived. Don't hesitate to stop at the refuge to have a drink or a snack while enjoying the view over the Fiz mountain range and the west face of the Buet!
For the return trip, take the wide vehicle track that goes down from the refuge and makes hairpin bends through the forest. Halfway down, you'll go past the Crepines chalets before metting, at the bottom, the track from Les Fonts refuge. Follow this vehicle track back to your car, at La Feulatière car park.
