This route is very close to hearts of runners from Lombardy as the rifugio ADM (Amici delle Montagne) used to be the summer training base for many of the region's top runners. They'd train twice a day, chop wood and clear trails. Pretty idyllic way to spend your summer and very different from pounding the track at St Moritz, where the mountains just make a nice backdrop. Here, the mountains are truly 'lived'.
Great route, it goes high, breaks the treeline and offers beautiful views.
Not really doable in winter. Unless it's one of those winters with very little snow.