The Seven Summits are the highest mountains of each of the seven continents. Summiting all of them is regarded as a mountaineering challenge, first achieved on April 30, 1985 by Richard Bass.
The Seven Summits are composed of each of the highest mountain peaks of each of seven continents. Different lists include slight variations, but generally the same core is maintained. The seven summits depend on the definition used for a continent, in particular where the border of that continent is. This results in two points of variation: the first is Mont Blanc or Mount Elbrus for the continent of Europe; and the second depends on whether one includes all of Oceania or mainland Australia as the continent, which results in either Mount Kosciuszko or Puncak Jaya (Carstensz Pyramid).
This creates several possible versions of the seven summits, and has also given rise to some completing all nine peaks.