Jatun Q'asa (Quechua jatun, hatun big, great, q'asa mountain pass, Teofilo Laime Ajacopa, Diccionario Bilingüe Iskay simipi yuyayk'ancha, La Paz, 2007 (Quechua-Spanish dictionary) "great mountain pass", Hispanicized spelling Jatun Khasa, Jatúncasa) is a mountain in the Tunari mountain range of the Bolivian Andes, about 5025 meters high.