Rimfire Minerals Corporation

Rimfire Minerals Corporation

January 31, 2007 11:50 ET

Rimfire Acquires Quesnel Trough Porphyry Copper-Gold Target

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Jan. 31, 2007) - David Caulfield, President and CEO of Rimfire Minerals Corporation (TSX VENTURE:RFM) is pleased to announce the completion of the acquisition of the Auddie Property, located 25 km north of Serengeti Resources' Kwanika porphyry copper-gold discovery (111 metres averaging 0.69% copper and 0.54 g/t gold) and 20 km south of the Lorraine Project in the Quesnel Trough in north-central British Columbia. The Auddie is a new grassroots porphyry copper-gold exploration target with access via the Omineca Mining Road.

A prospector discovered the Auddie in a 60 metre outcrop exposure on a recently constructed logging road. Chip sampling by Rimfire in October 2006 yielded one interval which assayed 0.16% copper and 0.02 g/t gold over 28 metres (including 6 metres averaging 0.52% copper and 0.07 g/t gold). A second interval averaged 0.31% copper and 0.02 g/t gold over 15 metres. These two intervals are separated by a 17 metre gap in sampling where bedrock is obscured by stockpiled, but mineralized, road fill material. Overburden covers outcrop at either end of the mineralized section, and as such, the full extent of this mineralization is unknown. Mineralization is hosted in porphyritic to equigranular monzonite with pervasive potassium feldspar alteration. Chalcopyrite and pyrite mineralization occurs on fractures and in quartz veinlets.

Rimfire has an option to earn a 100% interest in the Auddie Property from an individual for $115,000 in staged cash payments over four years and a minimum exploration expenditure of $30,000 in 2007. Rimfire's interest is subject to a 1% NSR, half of which can be purchased for $1 million.

About Rimfire

Rimfire Minerals Corporation is an aggressive, well-financed mineral exploration company with a portfolio of highly prospective gold and silver properties in western North America. Rimfire is partnered with Newmont Mining Company, Northgate Minerals Corporation, Fronteer Development Group, Cangold Limited, American Creek Resources Ltd., McEwen Capital Corporation, Arcus Development Group Inc. and BWG Mining.

On behalf of Rimfire Minerals Corporation

David A. Caulfield, President

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

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