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Re: News Releases - Monday, September 24, 2007
FRONTERA COPPER REPORTS CASH BALANCES OF $55 MILLION AND PROVIDES
AN UPDATE ON THIRD QUARTER PRODUCTION AT THE PIEDRAS VERDES
OPERATIONS
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Toronto, ON -- September 24, 2007 -- Frontera Copper Corporation (FCC:
TSX, FCC.NT, FCC.NT.A: TSX) is pleased to provide the following update
on the Company's cash balances and third quarter operating results at
the Piedras Verdes operations.

Frontera Copper reports that following the repurchase of approximately
C$8.9 million of its outstanding senior unsecured notes, its cash
balances are approximately $55 million. The Company's cash balances
are primarily invested in guaranteed investment certificates or similar
high-quality instruments with two major Canadian financial
institutions. The Company has no exposure to asset-backed commercial
paper and intends to continue investing its excess cash balances in the
same secure manner that it has to date.

The Company continually evaluates the best uses of its cash on behalf
of shareholders and has recently repurchased a portion of its senior
unsecured notes in the open market. The repurchases, consisting of
C$4.5 million of the notes maturing on June 15, 2010 and C$4.4 million
of the notes maturing on March 15, 2011 were purchased at approximately
their par value of C$1,000 per note and will be cancelled. The senior
unsecured notes bear interest at the rate of 10% per year and this
repurchase will result in annual interest expense savings of
approximately C$890,000. The Company will continue to evaluate
additional note repurchases as opportunities arise.

Frontera Copper continues to focus on maintaining its annual production
rate of 70 million pounds of copper cathode at the Piedras Verdes
operations. During the third quarter, sulfuric acid deliveries to the
operations were reduced due to a strike at the operations of its major
sulfuric acid supplier. The Company has been supplementing the acid
shortfall to a limited extent by obtaining additional supplies of
sulfuric acid from other sources. In addition, in early September
Hurricane Henriette caused record rain to fall at the Piedras Verdes
operations, which negatively impacted leach pad performance by diluting
the pregnant leach solution for a number of days. As a result, the
Company now expects third quarter production to be approximately 15
million pounds of "LME Grade A" quality copper cathode. Mining and
placement of ore on the leach pad were interrupted to a lesser extent
during the third quarter. Therefore, with the resumption of normal
acid deliveries, production improvements are expected to resume in the
fourth quarter and the Piedras Verdes operations are now expected to
achieve production for the full year of between 57 and 60 million
pounds of copper cathode. The Company's 2007 forecasts for cash
operating costs and capital expenditures remain unchanged at $1.19 to
$1.27 per pound (including prepaid royalties) and $37 million,
respectively.

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. 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.

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

Dave Peat
Vice President and Chief Financial Officer
Tel.: 602 424-5484
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 Sep 24, 2007 at 6:20:14 AM Pacific Time
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