| Hatun Q'asa | |
| Elevation M: | 4800 |
| Elevation Ref: | [1] |
| Location: | Peru, Arequipa Region, Condesuyos Province |
| Map: | Peru |
| Map Size: | 200 |
| Coordinates: | -15.0281°N -72.335°W |
Hatun Q'asa (Quechua hatun big (jatun in Bolivia), q'asa mountain pass, "big mountain pass", hispanicized spelling Jatun Casa) is a mountain in the Wansu mountain range in the Andes of Peru, about 4800m (15,700feet) high. It is situated in the Arequipa Region, Condesuyos Province, Cayarani District. Hatun Q'asa lies at the Q'illumayu valley (Quechua for "yellow river", also spelled Quellomayo).[1]