evidence: Ezio Alimonta, Carlo Claus and Cesare Maestri (Italy), 2/12/1970 to 60 meters from the summit. Steve Brewer and Jim Bridwell (USA) 4/1/1979 to the summit. [...] As part of his "vengeance" Maestri decided to attempt the route in the winter. He used a helicopter to carry equipment to the base of the peak, including a 180kg air compressor, and a wooden hut that was placed on the glacier near the base. Alimonta, Claus and Maestri spent 54 days working on the route in harsh winter conditions, and after climbing 600 meters they gave up. Also part of the expedition were C. Fava, R. Valentini and P. Vidi. They returned a few months later, in Spring, with a larger team that also included D. Angeli, C. Baldessari, F. Barozzi and J. Spickerman. On this occasion Maestri stopped some 60 meters below the summit, close to the end of the headwall, but still on vertical ground. He dismissed the final ice and snow commenting: "It's just a lump of ice, not really part of the mountain, it will blow away one of these days." Regarding Maestri’s high-point, Bridwell commented, "Looking up I saw seven broken bolts leading up and slightly right, but 25 meters of blank granite stretched between the last bolt and the summit snow. [...] CLIMBING AREAS Chaltén Massif Cerro San Lorenzo Cerro Murallón Cerro Riso Patron Cerro Catedral/Frey Tetons (USA)