Though four climbers were among those who reached the 8,848-meter summit of Mount Everest earlier this week, they never made it back to sea level. They perished climbing the peak, which has taken the lives of some 200 mountaineers since it was first ascended in 1953. As extreme climbing has grown in popularity, dangerous conditions including overcrowding and unstable conditions are making the sport more deadly. To rank the deadliest mountains, we first whittled the list to include only the 14 primary mountains in the world that exceed an altitude of 8,000 meters, or 26,246 feet. Dubbed the “death zone,” this is the height above sea level where limited atmospheric pressure is the most severe, and oxygen levels are severely depleted. From there, we ranked the mountains based on the most consistent and reliable source of death rate, or the number of deaths per climber attempts, compiled by Ederhard Juralski. The data include climbing data through June 2008 for each mountain. Catherine Destivelle, Sygma / Corbis Death rate: 1.46 Location: China/Nepal Altitude: 8,188 meters First ascent: 1954 Galen Rowell / Corbis Death rate: 2.27 Location: China Altitude: 8,034 meters First ascent: 1956 Galen Rowell / Corbis Death rate: 3.43 Location: China/Nepal Altitude: 8,516 meters First ascent: 1956 Dietrich Rose / Corbis Death rate: 5.29 Location: China/Pakistan Altitude: 8,051 meters First ascent: 1957 Ed Darack, Science Faction / Corbis Death rate: 5.7 Location: Nepal Altitude: 8,848 meters First ascent: 1953 Galen Rowell / Corbis Death rate: 8.39 Location: China Altitude: 8,027 meters First ascent: 1964 Association Chantal Mauduit Namaste, Sygma / Corbis Death rate: 9.43 Location: China Altitude: 8,080 meters First ascent: 1958 Galen Rowell / Corbis Death rate: 11.11 Location: Nepal/China Altitude: 8,485 meters First ascent: 1955 Ed Darack / Corbis Death rate: 16.2 Location: Nepal Altitude: 8,176 meters First ascent: 1960 Galen Rowell / Corbis Death rate: 19.14 Location: India/Nepal Altitude: 8,586 meters First ascent: 1955 Galen Rowell / Corbis Death rate: 22.3 Location: Pakistan Altitude: 8,125 meters First ascent: 1953 Earl Kowall / Corbis Death rate: 23.24 Location: China/Pakistan Altitude: 8,611 meters First ascent: 1954 Galen Rowell / Corbis Death rate: 37.91 Location: Nepal Altitude: 8,091 meters First ascent: 1950 Galen Rowell / Corbis