From the parking lot, continue east along the road which shortly becomes unpaved. After passing Malga Crostis below, the road skirts the southern ridge of Pezzacul continuing without major elevation changes up to the Tarondon valley, where just before the unpaved road descending to Casera Tarondon Bassa, take the path on the left that climbs the slopes.
Climbing diagonally on the marked path traces, pass the basin of Lake Tarondon gaining shortly beyond the route of path CAI 154.
Heading west, without major elevation changes, the path crosses below the eastern slope of M. Pezzacul and at the southern ridge, ascends through traces and scree toward the summit, generally keeping to the right of the ridge line. Just before the highest point, on the left, a narrow path cut into the rock descends toward the wide saddle, winding with small hairpin bends on the southern slope of the mountain.
From the saddle at 2072m elevation, the route resumes climbing towards M. Crostis, staying to the left of the watershed along grassy slopes and the remains of alpine huts from the First World War. Towards the summit, the route intersects the evident path CAI 151 with which, turning right, you shortly reach the summit.
From the summit of Crostis, along the evident path CAI 151, descend directly towards the starting point, first heading south and then with a final traverse towards southeast.
