Rio Alto Mining Limited
TSX VENTURE : RIO
FRANKFURT : MS2
BVLAC : RIO
OTCQX : RIOAF

Rio Alto Mining Limited

February 18, 2011 13:48 ET

Rio Alto Announces the Departure of Feisal Somji

CALGARY, ALBERTA--(Marketwire - Feb. 18, 2011) - Rio Alto Mining Limited (the "Corporation") (TSX VENTURE:RIO)(OTCQX:RIOAF)(BVLAC:RIO)(DBFrankfurt:MS2) announces that Mr. Feisal Somji has resigned as a director and officer of the Corporation.

Mr. Somji served as the President and Chief Executive Officer of the Corporation from May 2007 to June 2010 and most recently as the Corporation's Vice President Corporate Development. Among other successes, Mr. Somji was principally responsible for identifying, negotiating and concluding on behalf of the Corporation its June 2009 acquisition of a private mining company which held the rights to La Arena Project in north central Peru.

The Board would like to thank Mr. Somji for his dedication and service to the Corporation over the past number of years and wishes him every success in his future endeavours.

To learn more about Rio Alto Mining Limited, please visit: www.rioaltomining.com or Rio Alto's SEDAR profile at www.sedar.com.

ON BEHALF OF THE BOARD OF RIO ALTO MINING LIMITED

Klaus Zeitler, Director

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