Yanajaja[1] (possibly from Quechua yana black, qaqa rock,[2] "black rock") is a 5,173-metre-high (16,972 ft) mountain in the west of the Chila mountain range in the Andes of Peru.

It is located in the Arequipa Region, Castilla Province, Chachas District.

[1] Yanajaja lies southwest of Cerani at a lake named Cochapunco.

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