Ch'illkayuq Grande (Quechua ch'illka baccharis, -yuq a suffix to indicate possession, "the one that has got baccharis" or "the one with baccharis", Spanish grande large, hispanicized name Chilcayoc Grande) is a volcano in the Andes of Peru, about 3,243 metres (10,640 ft) high.[2] It is situated in the "Valley of the Volcanoes" in the Arequipa Region, Castilla Province, Andagua District.[3] Ch'illkayuq Grande lies south-west of the Chachas Lake and south-east of the volcanoes Ch'illkayuq and Hich'apita (3,388 m).