Huayna Potosí, 1977. Two ascents of the west face of Huayna Potosí were made by French, who apparently were unaware of the two routes put up earlier (1970 and 1974) by Americans. On April 27 and 28, 1977 Dominique Chapuis, Christian Charière and Christian Jacquier made the ascent and later Jean and Michel Afanassieff ascended the face. It is not known to us just what route they took.