======================================================================= News Release - September 14, 2009 MINEFINDERS REPORTS FIRST NI 43-101 COMPLIANT RESOURCE FOR ITS LA BOLSA PROPERTY ======================================================================= Vancouver, British Columbia � September 14, 2009 - Minefinders Corporation Ltd.

is pleased to report the first NI 43-101 compliant resource estimation for its 100 percent owned La Bolsa property located in northern Sonora, Mexico.�At a nominal 0.25 grams per tonne (�gpt�)�gold cutoff, the measured and indicated resource estimate includes 15.9 million tonnes grading 0.706 gpt gold and 9.4 gpt silver�totaling 360,000 ounces of gold and 4.8 million ounces of silver.�An additional 47,000 ounces of gold with 480,000 ounces of silver at the same cutoff are classified as inferred resources. �This NI 43-101 compliant resource is an important step in advancing the La Bolsa property to a construction decision,� commented Mark Bailey, President and Chief Executive Officer.

�La Bolsa has the potential to be the Company�s second low cost mine and, concurrent with the in process pre-feasibility study on the construction of a mine at La Bolsa, we are continuing the ongoing drill program to further expand the resource.� The resource estimate at varying cutoff grades is provided in Table 1 below: The table can be viewed on our web site at http://www.minefinders.com/news/index.php?&content_id=120 The resource estimation is based on the results from 165 drill holes (81 reverse-circulation holes and 84 core holes) completed within the property.

The Company is continuing to drill on the property with both a core drill rig and a reverse-circulation drill rig in order to continue to define the overall extent and geometry of the La Bolsa mineralized zone.�The resource estimation was prepared by the Company using Gemcom Gems software.

The estimation procedures, database and results have been independently reviewed and audited by David Linebarger a �qualified person� with Sacrison Engineering of Elko, Nevada.�A NI 43-101 compliant technical report will be filed by the Company within 45 days. The gold mineralization occurs within a shallowly dipping continuously mineralized oxidized blanket that is subparallel to topography and approximately 1,000 meters (3,300 feet) in length and up to 800 meters (2,600 feet) in width with thicknesses that range from 10 to 50 meters (30 to 165 feet).

Recent drilling at La Bolsa continues to extend that zone and this mineralization remains open both down-dip and along strike. A pre-feasibility study of the economic viability of a mine at the La Bolsa property is in process with results expected to be reported by the end of this year.

This updated resource and results from the current La Bolsa drill program will be used as the basis for construction of the reserve block model to be used in the study.

The shallow dip of the majority of mineralization in close proximity to the surface and favorable metallurgical characteristics (see news release dated May 21, 2009) suggest a mine plan that will incorporate low-cost open-pit mining in combination with simple heap-leach recovery of gold and silver. Quality Control and Assurance All analyses reported are fire assay analyses for gold and multi-acid digestion with AA analyses or fire assay analyses for silver, and completed by either Chemex Labs of Vancouver, Canada, or Inspectorate Labs of Sparks, Nevada.�Samples from these intervals were comprised of either HQ or NQ core or reverse-circulation cuttings.�All samples were representatively split prior to analysis and transported by the labs to sample preparatory facilities in Hermosillo, Mexico (Chemex) or Durango, Mexico (Inspectorate).

David Linebarger of Sacrison Engineering of Elko, Nevada is the �qualified person� whom has reviewed the database, estimation parameters, block model, and final tabulation for the La Bolsa Resource.

Mark Bailey MSc., P.Geo.

is the �qualified person� with overall responsibility for the La Bolsa Project and is responsible for the contents of this news release.

About Minefinders Minefinders is a precious metals mining and exploration company and operates the multi-million ounce Dolores gold and silver mine in Mexico.

The Company continues its exploration efforts on other prospective projects in Mexico to build a quality pipeline of precious metals projects for future growth. Investor contact:� Mike Wills Minefinders Corporation Ltd. (604) 687-6263 www.minefinders.com This release contains certain "forward-looking statements" and "forward-looking information" as defined under applicable Canadian and U.S.

securities laws.

Forward-looking statements generally can be identified by the use of forward-looking terminology such as "may," "will," "expect," "intend," "estimate," "anticipate," "believe," "continue" or similar terminology.

Forward-looking statements are based on forecasts of future results, estimates of amounts not yet determinable and assumptions that, while believed by management to be reasonable, are inherently subject to significant business, economic and competitive uncertainties and contingencies.

Certain of the statements made herein by Minefinders are forward-looking and subject to important risk factors and uncertainties, both known and unknown, many of which are beyond the Company�s ability to control or predict.

Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking statements.

Those factors are described or referred to under the heading "Risk Factors" of Minefinders Annual Information Form for the year ended December 31, 2008 and under the heading "Risks and Uncertainties" of Minefinders Management�s Discussion and Analysis for the year ended December 31, 2008 and quarter ended June 30, 2009, all of which are incorporated by reference herein and are available on SEDAR at www.sedar.com.

Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended.

There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements.

Cautionary Note to U.S.

Investors: The SEC permits mining companies to disclose only those mineral deposits that can be extracted or produced economically in their filings with the SEC.

This news release uses the term �inferred resource� that the SEC guidelines prohibit from inclusion in filings with the SEC. ======================================================================= Click or copy and paste the link below to unsubscribe from this list http://dissemination.blendermedia.com:81/u?id=1371438U&u=http://minefinders.com/unsubscribe/index.php?status%3Dunsubscribe&w=F&c=F&l=minefinders_com =======================================================================