Castleworth Ventures Inc.
TSX VENTURE : WTH

Castleworth Ventures Inc.

July 25, 2005 09:30 ET

Castleworth Starts Phase IV Drilling at Pan Gold Project; Testing New Targets in Large Area West of Pan Fault

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - July 25, 2005) - Castleworth Ventures Inc. (TSX VENTURE:WTH) reported today the commencement of a 6,000+-foot reverse circulation drill program at its 100%-owned Pan Gold Project near Eureka, Nevada.

This Phase IV program is designed to test a number of target areas on the 4,852 acre (more than 7.5 square miles) property, beginning with the Black Stallion Area, discovered in 2004, which has had no drilling within 250 meters.

That discovery hole (# 04-64), drilled in September 2004), returned 65 ft averaging 1.95 gpt from the outcrop and is located approximately one-half mile west of the main Pan Fault. That discovery has opened a new area and model that could substantially increase the ultimate scope of the project. Mineralization at Black Stallion is expected to be very shallow, with most holes planned to bottom at less than 200 feet.

This parallel fault, some 2,500+ feet west of the main Pan Fault has been identified and initial drill testing indicates a potential for higher grades and significant tonnages associated with the structure. It is possible that this structure may be a large splay from the main Pan structure, opening potential for large deep targets as well.

A 200-sample, close-spaced soil geochemistry grid over Black Stallion identified a sizable (200 X 600 meter) gold anomaly.

John Watson, Castleworth's president, said that "...As well as Black Stallion, this program may test a number of new targets recently identified by mapping and geochemistry, located in other areas west of the Pan Fault Zone."

Ten to fifteen drill holes are slated for the Syncline Area where several previously-drilled holes have intersected potentially economic grades along a northwest-trending structural zone several hundred meters west of the Pan Fault. At least three mineralized zones of modest size but attractive grades remain open to enlargement at Syncline.

Additionally, several new areas of alteration have been mapped and sampled, with results pending, which may also be drilled during the program. Michael Gustin, P.Geo, of Mine Development Associates is the company's qualified person on the Pan Gold project and oversees the Phase IV exploration program.

Current measured and indicated resources at the Pan Gold Project are reported at 361,400 ounces and inferred resources are 140,600 ounces, both at a 0.01opt gold cut-off and are based on records from 550 rotary, reverse circulation, and diamond core holes totaling 154,391 ft that were drilled between 1978 and 2004.(i)

Castleworth's objective is to create wealth for its stockholders by acquiring, exploring, and developing advanced-stage projects located within the major gold producing areas of Nevada. The Company's total land position is in excess of 10,000 acres, comprised of three projects on the Tonopah/Walker Lane Trend, two on the Battle Mountain-Eureka Trend and one on the Carlin Trend. Two of the projects have known mineralization or resources of potentially economic grade and dimension.

On behalf of the Board of Directors,

John E. Watson, President

(i)This resource estimate conforms to National Instrument 43-101 for resource disclosure and is included in an extensive technical report prepared by Michael Gustin, P.Geo, a qualified person, of Mine Development Associates, an independent Reno, Nevada mine engineering company. The full 43-101 compliant report is available on SEDAR and at www.castleworth.com.

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

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