Reach Simplon Pass and park the car.
Move west (fleischorn in front) until Hopsche houses.
Now you have to traverse the slopes of Tochuhorn with a lot of attention for avalanches reaching then a big plane with Spitzhorli at the end.
Ascend to the saddle (Rossen pass) and then turn to the right along the arete reaching the summit.
Descend along the same way.
Normal ski mountaineering gear.
If you have information about this route that doesn't pertain to any of the other sections, please add it here.