Ojos del Salado The elevation of Ojos del Salado has been the subject of debate. The mountain is hidden behind other peaks and thus its height was not appreciated in early research until 1937, when the mountain was climbed by Polish climbers. A 2006 article in Andes Magazine offered that Ojos del Salado may be higher than Aconcagua, although the argument was premised on older, less accurate altitude surveys. The results of these older surveys assigned Ojos del Salado an elevation of , which would have made it nearly higher than Aconcagua. As early as 1955, an estimate was made that the elevation
Ojos del Salado of Ojos del Salado was , but that was "simply [...] based on the altitude of the final camp, and the hours of ascent to the summit." In 1956, the first Chilean expedition led by the retired lieutenant René Gajardo measured the height of Ojos del Salado as with a pocket pressure altimeter. Apart from being an inexact method, the height shown by the altimeter was far too high as air pressure is generally lower in the afternoon, the time at which the team reached the summit. An expedition to the area in the 1990s claimed that nearby Monte Pissis