Please note: since Storm Alex, access to the Madone de Fenestre refuge is no longer possible, as the road is cut off 10 km earlier.
(S/E) From the Madone de Fenestre refuge, take the path towards Lac de Fenestre.
Pass the intersection (marker 368), keeping Lac de Fenestre on your right.
(1) At around 2000m, at a sharp bend with a large isolated rock, take a smaller, unmarked path to the right heading north-east. There is a start below and above the large rock: the two meet a little higher up.
Cairns quickly mark the path. Follow them to Lac Mort (2527m), then Lac Blanc (2665m).
(2) From Lac Blanc, head north towards the small pass Saint-Robert (small snowfields may be present).
Climb via the small pass Saint-Robert and the west-southwest ridge:
(3) From there, put on your helmet as you are leaving the hiking area for a mixed climbing-hiking route. There is no longer a visible path and you have to choose the best possible route through the scree and along the ridge. It took us 2 hours to reach the summit, progressing very slowly. It should be possible to do better.
From the small pass, we spotted a yellow painted trail leading to the top (sometimes there is quite a distance between two marks, but you eventually find them again).
Cross a few metres onto the Italian side and climb straight up the face (a few metres of climbing) from the small pass, then continue climbing generally below the ridge on the north side until you reach a large basin (occupied by a huge snowfield when we passed through in mid-July, which is probably there all the time). From there, at around 3000m, join the ridge (staying to the right of the snowfield) and climb until you reach the foot of a copper-coloured rock couloir (you can see a bolt and a plaque). Keep to the right in the scree to climb (there are lots of yellow markings in this section) towards the summit. Once above the couloir, head left to reach the summit ridge and then (finally) the north summit.
Descent via the north-east ridge:
(4) This is the most technical part of the route and a rope may be useful to secure the passage.
From the summit, a clear path descends rapidly towards the normal route: do not take it! This is mountaineering requiring appropriate equipment, and rock falls are frequent.
Go around the Virgin and head north-east. Descend the ridge for about 50 metres to a small, obvious pass, then follow the ridge line that leads straight to the Balcon du Gélas. It doesn't seem obvious at first glance (no cairns or traces of passage), and it looks like you can't get through... but it is indeed possible! It's more like climbing than hiking here too (no falling allowed), but the rock is very good and there are handholds everywhere. It took us 2 hours to get there from the summit, again progressing very slowly.
(5) From the balcony, we are back in hiking mode and the path is clearly visible for the descent to Lac Blanc.
(6) Then, retrace your steps to reach the large isolated boulder and the official trail, and it's another half hour to reach the refuge (S/E).
Note following one of the comments: the couloir is a mountaineering route (the normal route up Gélas) requiring appropriate equipment and knowledge. The route we suggest does not go that way.
