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
Blackhead Mountains Blackhead Mountains The Blackhead Mountains range is located near the northern end of the Catskill Mountains, in Greene County, New York, United States, where it divides the towns of Windham and Jewett. The three named peaks in the range — Thomas Cole Mountain (3,940 feet; 1,201 m), Black Dome (3,980 feet; 1,213 m), and Blackhead Mountain (also in the 3,940-foot range) — are the fourth-, third-, and fifth-highest peaks in the Catskills, respectively. The gap between Thomas Cole and Black Dome is, at 3,700 feet, the highest in the Catskills. To the west of Thomas Cole are two lesser, officially