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Re: News Releases - Monday, May 28, 2007
FRONTERA COPPER EXECUTIVE APPOINTMENTS
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Toronto, ON -- May 28, 2007 -- Frontera Copper Corporation (FCC: TSX,
FCC.NT, FCC. NT.A: TSX) is pleased to announce two executive
appointments at Cobre del Mayo, S.A. de C.V., (CDM), Frontera Copper's
wholly owned Mexican subsidiary.

Effective June 1, Jes�s Guti�rrez B. will assume the newly created
position of Director General of Cobre del Mayo, S.A. de C.V. Since
joining CDM as Director de Operaciones on June 30, 2005, Jes�s has
staffed and led the organization from feasibility through start up and
into production in near record time and with no significant upsets.
Jes�s Guti�rrez came to Frontera Copper with a technical background
rich in mining and processing operations and management. He has held
positions of varying responsibility, including Director de Operaciones
for Grupo Mexico's Cananea operations, Director General of Minera Real
de Angeles and Director General de Empresas Frisco. In his new role as
Director General, he will be responsible for all CDM operations and
business matters and will report directly to Gary Loving, President and
CEO of Frontera Copper.

The company is also very pleased to welcome Joseph P. Campbell to the
position of Director de Operaciones for Cobre del Mayo. Joe Campbell
has over twenty-four years of experience in management, supervisory and
engineering roles with Inmet Mining Company, Phelps Dodge Mining
Company (a subsidiary of Freeport-McMoRan Copper & Gold Inc.), Cyprus
Minerals, Cyprus Amax and Cleveland Cliffs. Most recently Joe was
Director Processing of Inmet Mining Company's Cobre Las Cruces, S.A.
Project, in Spain. Previously he worked at Phelps Dodge and Cyprus
Minerals properties located in Arizona and Peru. Joe has co-authored
several technical papers dealing with copper leaching and
electrowinning processes and has been a leader of the changes and
improvements incorporated at the Cerro Verde Operation in Arequipa,
Per�. Joe holds a Bachelor of Science degree in Metallurgical
Engineering from the University of Minnesota and is a member of the
SME/AIME and the Instituto de Ingenieros de Minas del Per�.

"With Piedras Verdes now operating at full production, our attention is
focused on improving our operating efficiencies," says Gary Loving,
President and CEO Frontera Copper. We continue to strengthen our
operating team, which will enable us to improve the operating cost
performance at Piedras Verdes and also to provide Frontera Copper with
the ability to evaluate and develop additional projects. With the
quality and depth of talent that we are fortunate to have at Frontera
Copper and Cobre del Mayo, I believe that we are uniquely positioned to
develop new additional projects, and utilize the significant cash flows
which are expected to be generated from the Piedras Verdes operations."


Annual General Meeting

Frontera Copper will hold the Annual General Meeting on June 27, 2007
at 3:00 p.m. The meeting will be held in Toronto at The Dominion Club
"Melinda Gallery," One King Street West.

About Frontera Copper

Frontera Copper is a Canadian mining, development and exploration
company whose principal activity is the production of copper cathode
from the Piedras Verdes run-of-mine heap-leach copper operation in
Sonora, Mexico. Production commenced in October, 2006.and has ramped up
to an annual rate of 70 million pounds. A total of 942 million pounds
of copper is projected to be produced during the 18-year life of the
operation. Existing resources and prospective exploration targets
adjacent to the main open-pit have the potential to extend the life of
the project.

The Company currently anticipates production of 60 to 63 million pounds
of "LME Grade A" quality copper cathode during 2007 at a cash cost of
approximately $1.19 to $1.27 per pound (including prepaid royalties).
Capital expenditures for 2007 are forecast at $30 million.

For further information, please see Frontera Copper's website at
www.fronteracopper.com or contact:

Ann Gibbs
Manager of Investor Relations
Tel.: 416 350-5132
Toll-free: 888 323-0973
Email: ann@fronteracopper.com

Dave Peat
Chief Financial Officer
Tel.: 602 667-3202
Email: dave.peat@fronteracopper.com

Information in this news release that is not current or historical
factual information may constitute forward-looking information or
statements within the meaning of applicable securities laws. Implicit
in this information, particularly in respect of statements as to future
operating results and economic performance of the Company, and
resources and reserves at the Piedras Verdes operations, are
assumptions regarding projected revenue and expense, copper prices and
mining costs. These assumptions, although considered reasonable by the
Company at the time of preparation, may prove to be incorrect. Readers
are cautioned that actual results are subject to a number of risks and
uncertainties, including risks relating to general economic conditions
and mining operations, and could differ materially from what is
currently expected. The Company disclaims any intention or obligation
to update or revise any forward-looking statements, whether as a result
of new information, future events or otherwise.

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Copyright (c) 2007 FRONTERA COPPER CORPORATION (FCC) All rights
reserved. For more information visit our website at
http://www.fronteracopper.com/ or send
mailto:emaillist@fronteracopper.com
Message sent on Mon May 28, 2007 at 7:18:00 AM Pacific Time
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