CanAlaska Reports West McArthur Uranium Project Winter Drilling Results

VANCOUVER, June 21 /PRNewswire-FirstCall/ - CanAlaska Uranium Ltd. (CVV - TSX.V) (the "Company" or "CanAlaska") is pleased to report results from the winter drill program at the West McArthur Project ("Project") and the commencement of additional summer 2010 exploration.

The West McArthur Project is located in the eastern portion of the Athabasca Basin, Saskatchewan, immediately to the west of Cameco Corporation's large uranium mine at McArthur River.

Exploration at the Project is being carried out under a 50/50 joint venture with MC Resources Canada ("MCRC"), a wholly owned subsidiary of Mitsubishi Corporation, and CanAlaska. In February 2010, after the start of the winter season, MCRC earned a 50% interest in the Project by completing the Cdn$11m investment specified under the Project's option agreement.

To view West McArthur Uranium Project maps please visit: http://www.canalaska.com/s/News.asp?ReportID=405914.

Over the next five years, the joint venture is planning to expend between Cdn$3.5-$4.2 million of annual exploration on the Project to carry out Phase 1 reconnaissance programs across the many areas prospective for uranium mineralization. Phase 2 programs are planned to commence under separate funding to develop targets within the property, if required.

In winter 2010, CanAlaska carried out a 6,071m drilling program combined with ground geophysics. The six-hole drill program was focused on a large conductive zone in the Grid 1 area on the western portion of the Project. Previous drill holes, located over an area 2.0km by 2.5km, have intersected separate zones of anomalous uranium mineralization, silicification, and sandstone alteration. The six holes, WMA 021 to WMA 026, are shown in Figure 2 along with previous drill holes. The 2010 winter drilling was successful in intersecting graphitic horizons which follow the conductive trend. Of particular note are the following:

    -   Single graphite horizons in WMA021 and WMA025
    -   Multiple graphitic horizons in WMA022 and WMA024
    -   Basement elevation differences of 33 metres between holes WMA011 and
        WMA024
    -   Basement elevation differences of 26 metres between holes WMA007 and
        WMA022
    -   Silicification in WMA022, WMA023, WMA025 and WMA026
    -   Illitization above the unconformity in sandstone in WMA024 and WMA026
    -   Hematitization and illitization in sandstone from 450 to 490 metres
        in WMA026
    -   Uranium mineralization in two holes:
           WMA022: 0.5m @ 0.013% U(3)O(8) in the basement (888.1-888.6m)
           WMA024: 0.5m @ 0.018% U(3)O(8) in sandstone (729.4-729.9m)

After reviewing the winter 2010 drilling results from the Project, President Peter Dasler commented, "We still have very few holes to establish the basement geology in this area, but where we do see evidence of hydrothermal alteration, it is extending well into the sandstone and is matching the typical alteration model of Athabasca unconformity style uranium deposits. It is also encouraging to see evidence of uranium mineralization in multiple areas, either as enrichment at the unconformity or in basement stringers. However, the most compelling features for further exploration are the uranium values in sandstone higher in the stratigraphy, the hematized and broken rock in the sandstone, and the pattern of basement offsets and geophysical conductivity. There is ample room here for multiple targets."

Following discussion of the winter 2010 exploration results at a recent joint venture management meeting, the joint venture will now contract further geophysical surveys on a property-wide basis commencing this summer and extend the winter geophysical survey for Grid 5 (located 10km SSE of Grid 1), where a well-defined conductor and low resistivity geophysical zone has been identified. The plan for exploration is progressively to test the seven grids on the property with Phase 1 surveys to outline potential and to provide the basis for Phase 2 target definition. Drilling is planned on Grid 5 in Winter 2011 as part of the Phase 1 evaluation program.

All of the samples from the West McArthur Project were submitted to Acme Laboratories, Vancouver, an ISO 9001:2000 accredited and qualified Canadian Laboratory, for their Group 4B analysis. These samples were analysed for uranium and multi-element geochemistry by tri-acid digestion and ICP-MS. The samples were collected by CanAlaska field geologists under the supervision of Dr. Karl Schimann, and were shipped in secure containment to the laboratories noted above.

Peter Dasler, M.Sc., P Geo. is the Qualified Person responsible for this news release.

About CanAlaska Uranium

CANALASKA URANIUM LTD. (CVV - TSX.V, CVVUF - OTCBB, DH7 - Frankfurt) is undertaking uranium exploration in twenty 100%-owned and three optioned uranium Projects in Canada's Athabasca Basin - the "Saudi Arabia of Uranium". Since September 2004, the Company has aggressively acquired one of the largest land positions in the region, comprising over 2,500,000 acres (10,117 sq. km or 3,906 sq. miles). To-date, CanAlaska has expended over Cdn$60 million exploring its properties and has delineated multiple uranium targets.

For more information visit www.canalaska.com.

    On behalf of the Board of Directors

    (signed)

    Peter Dasler, M.Sc., P.Geo.
    President & CEO, CanAlaska Uranium Ltd.

The TSX Venture has not reviewed and does not accept responsibility for the adequacy or accuracy of this release: CUSIP # 13708P 10 2. This news release contains certain "Forward-Looking Statements" within the meaning of Section 21E of the United States Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact, included herein are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's expectations are disclosed in the Company's documents filed from time to time with the British Columbia Securities Commission and the United States Securities & Exchange Commission.

SOURCE CanAlaska Uranium Ltd.

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