The first sector is called Mur du Grand Duc. This wall is overcome via various vertical, sometimes slightly overhanging passages, between which are traverse ledges. Finally, a long, diagonal climb leads leftward to an airy ladder section before the grass band is reached, the Vire des Chamois. It is possible to exit to the right (south) here. Alternatively, the via ferrata continues northwards along this grass band: first down a bit, then up a long way to the point where you have to down climb on rock to reach a traverse across a vertical wall. Shortly thereafter you are at the foot (about 1610 m) of the Grand Mur. Here is another possible exit, which does not look very inviting. The way forward looks also uninviting but you've got this far ... have courage: the next bit, up under the overhang is not that bad. Then the rock begins to tilt outwards - and the body with it; The carabiners can be weighted in this position, but the crook of the arm works well too. Now it really gets interesting, and there is only one thing to do: keep grabbing the next iron bar, and pull yourself up, up, up. Use your legs, making sure your shoes don't slip. And soon the crux will be over. The rest of the ascent through the Great Wall will seem a 'walk in the park' - until one last surprise: a fragile step, covered in wire netting, which you must more or less elegantly shuffle over. Where the via ferrata ends at ca. 1680 meters, the "Sortie des héros" (exit of heroes) board hangs. From here a path descends through sparse larch forest to a lookout point (about 1660 m) with a bench and route book.

From the grass band it is possible to exit rightwards (southeast).

Related route: Descent from Via ferrata d'Evolène