January 23, 2012

Rio Alto Mining Limited ("Rio Alto" or the "Company") (TSXV & BVL: RIO, OTCQX: RIOAF, DB Frankfurt: MS2) is pleased to announce that Alex Black will now serve as the Company's Chief Executive Officer in addition to his continuing role as President and that Victor Gobitz will serve as the Company's Chief Operating Officer commencing February 1, 2012.

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