Rio Alto Mining Limited ("Rio Alto" or the "Company") (TSX
VENTURE:RIO)(OTCQX:RIOAF)(LMA:RIO)(DBFrankfurt:MS2) is pleased to report that
gold production during construction and development of its 100% owned La Arena
Gold Mine amounted to 51,398 ounces during 2011. The Company is finalizing a
resource estimate to prepare an updated ore reserve and mining plan after which
Rio Alto will provide gold production guidance for 2012. 


The Company also wishes to announce that the share registrar and transfer agent
of the Company has been changed to Computershare Investor Services Inc. of 510
Burrard Street, 3rd Floor, Vancouver, British Columbia V6C 3B9 effective
December 31, 2011. In addition, on January 3, 2012, the rights agent under
Shareholders' Rights Plan Agreement dated August 26, 2010 has been changed to
Computershare Investor Services Inc.


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

Anthony Hawkshaw, Director & CFO
Rio2 (TSXV:RIO)
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