Grand QuayratThe pic du Grand Quayrat is a French pyrenean summit, culminating at in the vallée d'Oô.ToponymyIts name in Occitan cairat, meaning "square", comes from the distinctive shape of the summit, roughly forming a right angle, from the north.HistoryThe Grand Quayrat became the second climbed three thousander in 1789, ascended by physician Henri Reboul, leading an expedition from the barnes of Astau.