FOR IMMEDIATE RELEASE:

April 11, 2007

DRILLING COMMENCES FOR WOODLAWN FEASIBILITY STUDY, NSW

Tri Origin Exploration Ltd (TOE: TSX-V) is pleased to announce that its 53.9%-owned subsidiary Tri Origin Minerals Ltd. (TRO) has commenced drilling as part of its feasibility study at the Woodlawn Underground project in New South Wales, Australia.   An initial geotechnical hole has been completed and was successful in intersecting mine openings at the past producing Woodlawn Mine.  The deepest of these openings was at 300 metres below surface and was dry.  This is significant as it will allow TRO to access underground workings without the time and cost involved in dewatering to that depth.  Drilling will continue at the mine and at other TRO exploration projects within the Lachlan Fold Belt. 

The News Release as issued by TRO to the Australian Stock Exchange (ASX) is as follows:

Last week Tri Origin Minerals Ltd (TRO) announced the commencement of the Woodlawn Zinc Copper Project feasibility study. The Company is pleased to announce it has commenced drilling at Woodlawn as part of this study and drilling activities will be ongoing at and near Woodlawn and other TRO tenements within the Lachlan Fold Belt of New South Wales.

As part of the feasibility study a hole was drilled to ascertain the water level in the existing underground workings.  This hole intersected two separate mine voids and did not encounter any water. The workings at the base of the hole are approximately 300 metres below surface. This is a significant finding in that gaining access to underground to at least this depth will not entail mine dewatering. This may reduce the cost of mine evaluation during the feasibility study and estimates for mine rehabilitation. The mine was considered a relatively dry operation as verified by this initial result.

It is planned to also use the drill rig to conduct mine and infrastructure site geotechnical surveys.

Within the Lachlan Fold Belt the Company has a significant exploration landholding considered highly prospective for volcanogenic massive sulphide (VMS) deposits.

Two drill holes are planned within EL 6493, each targeting coincident geophysical and geochemical anomalies within the prospective Woodlawn Volcanics about 4 kilometres west of the Woodlawn Mine. Around 600 metres of drilling is planned with follow up down hole electromagnetic surveys. The Company is exploring for Woodlawn style mineralisation (zinc rich VMS).

Following the completion of these holes and prior to further drilling at Woodlawn drilling is planned at the Overflow Prospect (EL5878) located approximately 180 kilometres west of Dubbo, New South Wales. Drilling at Overflow will:

·        Further assess the extent of mineralisation below the old Overflow Mine; and

·        Evaluate down dip potential of highly anomalous gossans (assaying up to 18% lead) and coincident geophysical anomalies.

Previously reported drill results from the Overflow Mine that reflect the target mineralisation potential include significant intercepts such as:

·        Hole TBB001 (7 metres from 163 metres @ 5.93g/t Au, 28g/t Ag, 0.1% Cu, 1.7% Pb, 4.0% Zn); and

·        Hole TBB008  (6 metres from 236 metres @ 7.61g/t Au, 22g/t Ag, 0.4 % Cu, 1.6 % Pb, 2.2 % Zn).

This news release can be publicly accessed at www.asx.com.au under Listed Company Documents filed by Tri Origin Minerals Ltd. TRO’s reporting of mineral resources, exploration results and qualifications of competent persons are in accordance with the 2004 Edition of the Australasian Code for Reporting of Exploration Results and the JORC Code of December 17, 2004. Although these codes may differ in some regards to Canadian Standards including NI 43-101, it is the opinion of TOE management that statements made in the TRO report are, in all material regards, compliant with NI 43-101.

For further information please contact:

Tri Origin Exploration Ltd.

Dr. Robert Valliant, President

Tel: (905) 294-9942

Web page: www.triorigin.com

E-mail: invest@triorigin.com

Tri Origin Exploration Ltd. is publicly listed on the TSX Venture Exchange under the trading symbol TOE.

Tri Origin has leveraged exposure to mineral discoveries in Australia through its 53.9% equity interest in its subsidiary, Tri Origin Minerals Ltd., a publicly traded company listed on the Australian Stock Exchange under the symbol TRO.