Symbol:-TSX-V:VR

OTCQX:VRCFF

VANCOUVER, June 18, 2012 /PRNewswire/ – SIERRA IRON ORE CORP (the “Company”) is
pleased to announce that it has begun trading on the
OTCQX-International (the “OTCQX”) under the symbol “SIOCF.” The OTCQX
is the highest tier of the OTC Markets and the Company is pleased to
increase accessibility for U.S. investors. The OTCQX membership was
sponsored and facilitated by Kenneth I. Denos, P.C. who will act as the
Company’s Principal American Liaison.

OTC Markets Group Inc. is a leading financial information and technology
services Company that provides the world’s largest electronic
inter-dealer quotation system, trading technology and financial
information provider for over-the-counter (OTC) securities in the
United States. The webpage for Sierra Iron Ore Corp. to access
financials, news, contact information and quote & trade information is http://www.otcmarkets.com/stock/SIOCF/quote .

“The OTCQX platform offers investor-focused companies a winning
combination of quality control, transparency, and broader visibility to
U.S. investors,” said R. Cromwell Coulson, President and Chief
Executive Officer of OTC Markets Group. “We are pleased to welcome
Sierra Iron Ore Corp to OTCQX.”

“With the recent completion of the access road to the Veinte zone and
the start of the core drill program on the El Creston property, it is
an ideal time to increase our corporate profile to U.S. investors,”
stated Wally Boguski, President and CEO. “The core drill program will
help us gather data for the geometry and grade of each magnetite body
to establish the required parameters for resource definition”

About Sierra Iron Ore
Sierra Iron Ore is a growth focused mineral exploration company creating
value through the exploration and development of the El Creston
property located in the Sinoala State of Mexico. The company has a
continual fieldwork program at the El Creston Property that is
comprised of drilling, mapping, sampling and planning for further
property development. Roads have been built and upgraded as well as
equipment has been mobilized for further developing the known iron ore
mineral zones identified by recent exploration work.

On behalf of The Board of Directors of Sierra Iron Ore Corporation.

Paul Lee, Director

SOURCE Sierra Iron Ore Corporation