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July 27, 2012 – Vancouver, BC: Riverside Resources Inc. ("Riverside" or the "Company") (TSX-V: RRI) announces that it has received notice from Guerrero Exploration Inc. (“Guerrero”) of its termination of the reorganization agreement between Riverside and Guerrero (the “Reorganization Agreement”) announced June 19, 2012. At the time the Reorganization Agreement was entered into, Guerrero was in default with respect to its option to acquire up to a 70% interest in the Chapalota property, Mexico, from the Company pursuant to an option agreement between the parties (the “Chapalota Option Agreement”) announced June 30, 2011. One of the purposes of the Reorganization Agreement was to set forth new terms upon which Guerrero could earn a 100% interest in the Chapalota property. With the termination of the Reorganization Agreement, Guerrero’s option to acquire an interest in the Chapalota property has now terminated.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

John-Mark Staude

President & CEO
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Joness Lang

Manager, Corporate Development
Riverside Resources Inc.
Phone: (800) RIV-RES1
Fax: (778) 327-6675
Web: www.rivres.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.