Seven Third Summits Sumantri () and Ngga Pulu (). The definition of "continent" is a matter of some dispute among mountaineers seeking to complete this challenge. The main ridge of the Greater Caucasus range is generally considered to form the boundary between Europe and Asia. In that case, Mount Elbrus () and Dykh-Tau (), are the two highest mountains in Europe. Excluding the Caucasus Mountains, Mont Blanc () and Monte Rosa () would be Europe's two highest mountains. The Australian continent is defined as comprising the mainland of Australia and proximate islands on the same continental shelf, including Tasmania and New Guinea. In
Mount Elbrus 100 people to be attempting the summit via this route each day. Winter ascents are rare, and are usually undertaken only by very experienced climbers. Elbrus is notorious for its brutal winter weather, and summit attempts are few and far between. The climb is not technically difficult, but it is physically arduous because of the elevations and the frequent strong winds. The average annual death toll on Elbrus is 15–30, primarily due to "many unorganized and poorly equipped" attempts to summit the mountain. Since 1986, Elbrus has been incorporated into Prielbrusye National Park, one of the Protected areas of Russia.