From the yard of Rifugio Ca' S. Marco (1830 m- car parking lot) take the path near the electric trellis, (first stretch (20 ' about) overlapped on 101 path then leading downhill to AcquaNera).
Il Club Alpino Italiano (C.A.I.) [...] ha per iscopo l'alpinismo in ogni sua manifestazione, la conoscenza e lo studio delle montagne, specialmente di quelle italiane, e la difesa del loro ambiente naturale.Statuto del Club Alpino Italiano, Articolo 1
Alta Valle Brembana
WARNING: the stretch between via Piana and Pusdosso is not viable due to fallen trees. The access to Via Piana hamlet is anyway possible, but to complete the loop trail to other hamlets (Cornelli, Foppa, Pusdosso and Forcella) it is necessary to use the paved road or the path starting from Fondra on the main road just beyond the bar (18 August 2017).
From Ponte dell’ Acqua (1250 m) above Mezzoldo, beyond the water basin, the path climbs on the left (signpost). Follow climbing in the woods to the meadows of Dosso Gambetta (1648 m) and the crossroad with the 113-path leading to Ca ' San Marco.
Coming from Mezzoldo, the path starts just before to get Le Piazzole (hamlet of Piazzatorre -781 m). Take the forest road heading northward, on the left side of the main road. Walking along the hillside, enter Pegherolo valley, cross it on a bridge at around 920 m a.s.l.