Board of Directors Recommends Rejection of Unsolicited Offer From Invecture Group

Toronto and Phoenix, AZ - December 18, 2008 - Frontera Copper Corporation (FCC:TSX, FCC.NT:TSX, FCC.NT.A:TSX) today announced that its Board of Directors has unanimously recommended that shareholders REJECT the unsolicited offer from Invecture Group, S.A. de C.V. ("Invecture"), to purchase all of the outstanding common shares of the Company for Cdn$0.59 per share (the "Offer").

In its Directors' Circular being filed today on SEDAR and mailed to shareholders, the Board strongly recommended that all Frontera shareholders REJECT the Offer and not tender their shares for the following reasons:

• Superior proposals delivering greater value for shareholders may emerge
• The Offer undervalues Frontera's assets
• The timing of the Offer is opportunistic given the recent decline in the price of copper and in the price of Frontera shares
• The Offer is highly conditional and discretionary
• There is uncertainty with respect to Invecture's intentions
• The Company's financial advisor has provided an opinion that the consideration offered pursuant to the Offer is inadequate, from a financial point of view, to Frontera shareholders other than Invecture and its affiliates