As seen in the image below, the route to Corno Vitello starts from Valfredda Pass along Trail 5A in the direction of Val D’Ayas, arriving at a junction where Trail 5B begins. From this point the trail ascends to the ridge, which it follows, keeping to the left/west flank, until it touches a deep, vertiginous but not dangerous rift. From here a traverse cuts across the flank of Corno Vitello to a rightward turn, after which the steep terminal debris slope is directly ascended.
The track of the route
From Valfredda Pass continue along Trail 5A, which overlooks above the Valfredda Lakes in Val D’Ayas.
The lakes of Valfredda on the slope of Ayas
After a few meters, a fork is encountered: abandon 5A, which continues downhill toward Valfredda Lakes, and take a right onto trail 5B, bending northward.
The junction between the 5A, which descends to the Valfredda lakes, and the 5B
You bend toward the ridge, reach a large stone cairn…
Climbing along the ridge, the Corno Vitello in the center
…and proceed along the ridge, moving at times to the left side (facing northwest), always following the rather obvious trail markers and stone cairns.
Approaching Corno Vitello, before the rift
A tower is circumvented to the left, preceded by a deep cleft in the ridge…
The rift along the ridge
…and cross the western flank of the mountain, traversing an expanse of large boulders, until you reach the foot of the short, steep slope of rocks and debris on the right, which you climb without much trouble, thus reaching the summit of Corno Vitello (3057m) .
The little summit cairn of Corno Vitello, Testa Grigia in the background
This is the map of the trail, according to the SCT Trail Cadastre of the Aosta Valley.