Sergent lies just below Ceresole Reale in the Orco valley of the Gran Paradiso national park in the Piemont region. The Orco valley runs roughly parallel to the Val d'Aosta but south of the 4000m summit. Cogne is the other side of the mountain.
Access from the region of Ivrea, north west of turin. See Rock Paradise (M.Oviglia) guidebook for the mountain crags or Valle dell' Orco guidebook (same author) for the valley crags such as Sergent.