RIO GRANDE MINING CORP. COMPANY UPDATE

April 30, 2014 – Rio Grande Mining Corp. (TSXV-RGV) (the “Company”) is pleased to announce that the Company has submitted a NI 43-101 Technical Report to the TSX Venture Exchange in support of an earn-in transaction for the Mitchell Lake Uranium Project, first announced on April 15, 2014.

Under the terms of the agreement, the Company can earn a 50% interest in the project from Unity Energy Corp. (TSXV-UTY) by making cash payments totaling $100,000 over the next 12 months and incurring $3,000,000 in exploration expenditures over 4 years.

In addition, the company has withdrawn its application to acquire the Pattyson Lake Property.

For more information please contact the Company at 1 604 676-9650 or email: info@riograndemining.com

On behalf of the Board of Directors,

“ADRIAN LAMOUREUX”

President & CEO

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