Q'illu Q'asa (Quechua q'illu yellow, q'asa mountain pass, "yellow mountain pass", hispanicized spelling Jellojasa) is a mountain in the Andes of Peru, about high. It is located in the ApurÃÂmac Region, Abancay Province, on the border of the districts of Abancay and Tamburco. Q'illu Q'asa lies southeast of Ampay and west of a lake named Usphaqucha.