Carstensz aka Puncak Jaya (pronounced [?p?nt?ak ?d?aja]), sometimes called Mount Carstensz or the Carstensz Pyramid, is a mountain in the Sudirman Range, the western central highlands of Papua province, Indonesia. Other names include Nemangkawi in the Amungkal language, Carstensz Toppen and Gunung Sukarno.
Puncak Jaya is the highest mountain in Indonesia, the highest on the island of New Guinea (which comprises the Indonesian Papua provinces plus Papua New Guinea), the highest on the Australia-New Guinea continent and the highest in Oceania. It is also the highest point between the Himalayas and the Andes and the highest island peak in the world.
The Puncak Jaya area in mid 2005, with the Grasberg (Freeport) copper mine pit in the foreground and remnants of the glaciers behind. The summit is at the far end of the central rib.
Puncak Jaya is one of the more demanding climbs in one version of the Seven Summits peak-bagging list. (It is replaced by Mount Kosciuszko in the other version.) It is held to have the highest technical rating, though not the greatest physical demands of that list’s ascents. The standard route is up the north face and along the summit ridge, which is all hard rock surface.
Despite the large mine, the area is highly inaccessible to hikers and the general public, requiring a 100-km hike from the nearest town with an airport, Timika, to the base camp, which usually takes about four or five days each way.