The Iron Will of Juanito Oiarzabal: The Spanish 26 Summits in the Death Zone Among the titans of high-altitude mountaineering, few names resonate with the sheer volume of achievement and raw durability as that of Juan Eusebio Oiarzabal Urteaga, known universally as Juanito Oiarzabal. A Basque climber whose career spans over three decades and c