Tomasz Mackiewicz to summit Nanga Parbat in winter. While climbing with Klonowski in 2015, he reached a height of and in 2016, along with the French climber Élisabeth Revol, he reached an altitude of on Nanga Parbat. On January 25, 2018, while attempting his seventh winter ascent of Nanga Parbat, known as the "Killer Mountain", in Pakistan, at , Mackiewicz along with French climber Elisabeth Revol had reached the summit from the Diamer side. At the summit Revol noticed Mackiewicz's bad condition and started taking him down. According to Revol, he could not walk, see or even communicate and was bleeding profusely
1939 American Karakoram expedition to K2 time in America. In 1935 he became a U.S. citizen and the next year he and Bill House became celebrated as the first people to climb Mount Waddington in Canada, a mountain on which there had previously been sixteen unsuccessful attempts. By 1938 he had become the pre-eminent American climber and, having been on Nanga Parbat, the only one with experience on an eight-thousand-metre peak. He seemed the obvious choice to lead the 1938 expedition for which he had led the successful attempts to secure funding. As it turned out he had prior commitments in 1938 but he was available