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Re:   News Archive - Monday, September 08, 2008
      Rimfire and Inmet Commence  Drilling at Grizzly
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PR08--13

Vancouver, BC -- Sept 8, 2008:  Rimfire Minerals Corporation,
TSX-V:RFM, is pleased to announce that in partnership with Inmet
Mining,  it has commenced the second phase of fieldwork at the Grizzly
Property in northwest British Columbia.  Phase 2 will consist of 1500
metres of drilling aimed at targets defined by the first phase program
which included prospecting, mapping, soil geochemistry and a 32 line
kilometre Induced Polarization (IP) survey. The drill program will test
the Grizzly showing and targets on the Mirko Grid. The Grizzly
copper-gold porphyry target shows a number of similarities to Teck
Cominco/Novagold's Galore Creek deposit, including the volcanic host
rocks, associated magacrystic syenite porphyries, regional magnetic
signature and style and composition of hydrothermal alteration and
mineralization. The Grizzly Property is approximately 50 kilometres
east of the Galore Creek project and within four kilometres of the
partially completed Galore Creek access road.

Previously reported mineralization from trenches at the Grizzly Showing
returned results which included 38 metres averaging 0.74% copper and
1.1 g/t gold from continuous chip sampling. This copper and gold
mineralization is reflected in the 2008 IP survey as chargeability
values of 10 to 15 mV/V. This geophysical signature defines an area of
potential copper -- gold mineralization that is 750 metres wide by 400
metres long and open to the northeast, east and to depth. This area of
high chargeability is also coincident with a one square kilometre
copper, gold and molybdenum soil geochemical anomaly which taken
together define a compelling target. The 1500 metre drilling program
directed at targets on both the Grizzly showing and the Mirko grid will
be financed by Inmet Mining.

"We are very pleased that the IP has responded by highlighting and
characterizing the surface mineralization at the Grizzly Showing,"
stated Jason Weber, P.Geo., President and CEO. "The knowledge we have
gained by modeling the known mineralization with IP allows us to target
aggressively within the large area of positive IP response in
particular where those same areas coincide with strong copper and gold
geochemistry."


The Mirko Grid
Soil sampling on the Grizzly property identified zones with anomalous
copper, gold and molybdenum geochemistry two kilometres to the
northwest of the Grizzly showing. This area (the Mirko Grid) is
interpreted to be geologically similar to the Grizzly Showing based on
airborne magnetic data and sparse outcrop; however the source of the
soil anomalies is largely unknown due to poor exposure. Three
consecutive 400 metre-spaced IP lines identified 100 to 200 metre wide
zones with anomalous chargeabilities coincident with some of the
highest molybdenum, copper and gold values in the Mirko soil
geochemical anomaly. This pattern of coincident IP chargeability and
anomalous soil geochemistry also provides the basis for a drill targets
on the Mirko Grid.

The Grizzly project is being explored through a partnership with Inmet
Mining announced January 2008. Under the terms of the agreement, Inmet
Mining may earn up to a 60% interest in the property by funding at
least $5 million in exploration at the Grizzly over four years. For
additional information please see the press release dated January 31st,
2008.

This news release has been reviewed by Mark Baknes, M.Sc., P.Geo., VP
Exploration for Rimfire Minerals Corporation, a Qualified Person for
the purpose of National Instrument 43-101.





About Rimfire

Rimfire Minerals Corporation is an aggressive, well-financed mineral
exploration company with a portfolio of highly prospective gold and
copper properties in western North America and Australia. Rimfire
currently has in excess of two years of operating capital, and finances
approximately 80% of its exploration through option and joint venture
agreements. Current and former partners include AngloGold Ashanti
Limited, Barrick Gold Corporation, Newmont Mining Company, Inmet Mining
Corporation, Northgate Minerals Corporation, Fronteer Development Group
Inc., Rubicon Minerals Corporation, American Creek Resources Ltd.,
Island Arc Exploration Corporation, Jaguar Minerals Limited and BWG.


On behalf of Rimfire Minerals Corporation

"Jason Weber"

Jason Weber, P.Geo., President & CEO

CAUTIONARY STATEMENT:  No stock exchange, securities commission or
other regulatory authority has approved or disapproved the information
contained herein.  This News Release includes certain "forward-looking
statements".  Other than statements of historical fact, all statements
included in this release, including, without limitation, statements
regarding future plans and objectives of Rimfire Minerals Corporation,
are forward-looking statements that involve various risks and
uncertainties.  There can be no assurance that such statements will
prove to be accurate, and actual results and future events could differ
materially from those anticipated in such statements.  Important
factors that could cause actual results to differ materially from
Rimfire's expectations are the risks detailed herein and from time to
time in the filings made by Rimfire Minerals Corporation with
securities regulators.  Those filings can be found on the Internet at
http://www.sedar.com and
http://www.sec.gov/edgar/searchedgar/companysearch.html.

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Copyright (c) 2008 RIMFIRE MINERALS CORPORATION (RFM)  All rights
reserved.  For more information visit our website at
http://www.rimfire.ca/ or send mailto:info@rimfire.ca
Message sent on Mon Sep 8, 2008 at 7:53:01 AM Pacific Time
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