Triex Minerals Corporation and Pitchstone Exploration Ltd. are pleased to announce that drilling has started at the Mountain Lake uranium deposit in the Hornby Basin, Nunavut. The main objective of this year’s program is to test for additional deposits in the district.

The 50:50 joint venture (the “Joint Venture”), is actively exploring five properties in the Hornby Basin, including its Mountain Lake uranium deposit, with land holdings in the region totaling approximately 221,000 hectares. The Company’s website (www.triexminerals.com) contains a property location map, and all maps referred to below. The Mountain Lake uranium deposit is located 100 kilometres southwest of the coastal community of Kugluktuk (formerly Coppermine), Nunavut.

The 2007 exploration budget for the Hornby Basin properties is $2.3 million, directed mostly to drilling. A total of 5,000 metres of diamond drilling has been contracted to Connors Drilling Ltd. Re-opening of the Kirwin Lake camp and mobilization of all equipment was completed by the third week in April. Drilling commenced on May 8th, and is expected to be complete by the end of June.

Drilling at Zargut Lake is underway where a minimum of three holes will be completed to test for the extension of the Mountain Lake deposit to the north. The main focus of the 2007 program is to test for additional deposits in the district. Four holes are planned at Helmut Lake and sixteen holes at Dismal Lake (see Hornby Basin Drill Targets 2007 map). A down-hole Mount Sopris 2PGA-1000 poly-gamma probe will be used on all holes.

The Mountain Lake deposit contains the only identified uranium resource in the Hornby Basin (Inferred Mineral Resource of 8.2 million pounds U3O8, with an average grade of 0.23% U3O8 contained in 1.6 million tonnes of rock; see NI 43-101 Technical Report on SEDAR).

Triex is the operator for the Joint Venture. Allan Armitage, Ph.D., P.Geo., is a Qualified Person as defined by National Instrument 43-101, and is responsible for program design and quality control of exploration undertaken by Triex in the Hornby Basin. This release has been reviewed by Dr. Michael Gunning, Ph.D., P.Geo., President of Triex, and a Qualified Person as defined by National Instrument 43- 101.

Triex is a Canadian junior mineral exploration company focused on uranium opportunities in North America. The company is working in three proven districts, advancing eight projects which span grass roots reconnaissance exploration to advanced-stage resource delineation. The 2007 exploration budget is $8.7 million.

TRIEX MINERALS CORPORATION

Michael Gunning, President

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

Contact:

Michael Gunning
Triex Minerals Corporation
President
(604) 687-6680
604) 687-1448 (FAX)
Website: www.triexminerals.com

Source: Triex Minerals Corporation

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