In the municipality of Mezzoldo, starting from the cemetery, the historical and hiking trails coincide and continue without interruptions up to the pass, Passo San Marco, on the boundary with the Province of Sondrio. The initial stretch from the Val di Sera valley to the Mezzoldo cemetery continues along the Via del Ferro trail. As regards hiking, this is the most challenging section in terms of distance (12.2 km) and vertical ascent (1,370 m).