Climber and alpine guide, Gian Carlo Grassi (1946-1991) is known for having set up climbing routes in the nineteen seventies in the Orco Valley and in many areas in Piedmont, as well as for his climbs up the erratic masses in lower Susa Valley, where he lived. Subsequently, he was a protagonist of the new waterfall ice climbing sport and transferred that technique into the upper mountain with a series of challenging climbs up the massif of Mont Blanc, like the “slide” on the north side of the Aiguille Verte and the Ypercouloir on the southern face of the Grandes Jorasses.