Portal Resources Ltd.
TSX VENTURE : PDO

Portal Resources Ltd.

June 20, 2008 17:56 ET

Portal Terminates Slick Rock Option

VANCOUVER, BRITISH COLUMBIA--(Marketwire - June 20, 2008) - Portal Resources Ltd. (TSX VENTURE:PDO) announces that it has terminated the Slick Rock Option agreement under which Portal was earning an interest in claims held by Maral LLC in the southern portion of the Uravan Mineral belt in south western Colorado.

Results from a recent drill program, on a portion of the Slick Rock claim group, identified a roll front style system hosting uranium mineralization. However Portal views the potential of the mineralized system to be insufficient to warrant additional work.

Portal Resources Ltd. is a well funded exploration company listed on the TSX Venture Exchange with a portfolio of projects in Argentina with defined potential for base and precious metals, molybdenum and uranium. Portal has an excellent, experienced management team with proven capabilities for discovery and development of major mines.

In addition to its current portfolio of projects, Portal is aggressively searching for new opportunities with a focus on base and precious metals in North and South America.

All work on the Slick Rock project was carried out by competent geological staff under the overall guidance of Portal's VP Exploration, Mr. Alex Boronowski, P.Geo. British Columbia, the designated Qualified Person in accordance with National Instrument 43-101. Mr. Alex Boronowski has reviewed this news release.

ON BEHALF OF PORTAL RESOURCES LTD.

Bruce Winfield, President & CEO

This Press Release may contain, in addition to historical information, forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. These statements are based on management's expectations and beliefs, and involve risks and uncertainties. These statements may involve known and unknown risks and uncertainties and other factors that may cause the actual results to be materially different from the results implied herein.

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

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