Ojos del Salado was even higher than Ojos del Salado. Later measurements using more precise equipment showed that Ojos del Salado is about higher than Pissis. Furthermore, in 2007 a Chilean–Argentine–European expedition organized by Andes Magazine and Azimut 360 performed a survey on both Ojos del Salado and Monte Pissis using more accurate instruments. It found the former to be and the latter Although this fits within recent handheld GPS surveys, which have estimated the mountain to be between and , the vertical error margin of the expedition's equipment, , leaves uncertainty as to the mountain's more precise altitude. Ojos del Salado has
Spanish Peaks (Montana) Spanish Peaks (Montana) The Spanish Peaks, avg el. , is a mountain range between Bozeman, Montana and Ennis, Montana in Gallatin and Madison County, Montana. It is a sub-range of the much larger Madison Range, itself a sub-range of the Rocky Mountains. The hydrological divide of the range serves as the border between Gallatin and Madison County, Montana. The Spanish Peaks are made up of 1.6 billion year-old gneiss, making them the oldest peaks in the Madison Range, predating the rest of the range by 50-60 million years. Gallatin Peak, el. 11,015 ft., is the highest peak in the group.