Alta Via 3, the 'Via dei Camosci' (Chamois Way), runs north-to-south through the wildest corner of the Dolomites: from Villabassa in the Val Pusteria down to Longarone in the Belluno valley, crossing the Cadini di Misurina, Sorapiss, Marmarole and Antelao groups.
It is technically harder than AV1 — several days include exposed cabled traverses and one mandatory via ferrata (the Sentiero Vandelli around the Sorapiss lake) — but receives a fraction of the traffic. Most days end at small, family-run rifugi where you'll be one of fifteen guests, not one of eighty.