From the village, we followed the GR54  to the parking (Charvet), forked right leaving the GR and ascended along a track to the footbridge over the torrent. On the other side of  the bridge, the path to Brunichard and Les Sagnières was available but there was a large herd of livestock all over. Not to disturb them, we continued straight to Les Grangettes, an old high-altitude hamlet mostly in ruins. We decided to continue upstream  along the valley. We recrossed the Grand Tabuc and ascended along a dirt track then a path. The scenery was impressive. There was still a lot of water in the torrent. 

In the upper valley, we reached an area named Champ Vieux. It consisted of large boulders, high grass and wet stretches. Apart from the first Ecrins Glaciers in front of us, it was actually less interesting than the Grand Tabuc Torrent banks. It marked our turning point today. The path continued to Pas de l’Ane and Col des Grangettes.

We descended a bit for our break in a nice spot, then continued along the right bank of the torrent all the way to the lower bridge. Crossing it, we merged with our initial itinerary and hiked back to le Monêtier.