In addition to the La Arena gold oxide and copper / gold porphyry resources, the Report identified several prospects within the property that have been defined by a combination of soil geochemistry and exploration diamond drilling (i.e. Cerro Colorado, El Alizar porphyry, Agua Blanca epithermal and porphyry, Pena Colorado and La Florida). During 2011, Rio Alto has identified two additional prospects: San Andres (see March 14, 2011 news release) and Astrid (see June 15, 2011 news release).

Most exploration over the past 15 years has been focused on the La Arena Project deposit. Additional mineral occurrences and geochemical anomalies have been identified in the wider area of the property, but all have very limited drilling as described under Exploration (page 47) of the Technical Report.