Usqullu (Quechua for Andean mountain cat,[2] hispanicized spelling Oscollo) is a mountain in the Andes of Peru, about 5,000 metres (16,404 ft) high.

It is situated in the Arequipa Region, Castilla Province, Andagua District.

Usqullu lies northwest of the peak of Wakapallqa (Huagapalca) and northeast of Puma Ranra and Usqullu Lake.

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