Tyhee Obtains High Grade Gold On Strike With The Main Zone At Clan Lake, Yellowknife Gold Project, NWT Canada

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08:30 EDT Tuesday, October 27, 2009

TSX Venture: TDC

VANCOUVER, Oct. 27 /CNW/ - Tyhee Development Corp. (TSX Venture, TDC) today announced trench results from the summer program at its Clan Lake Property, Yellowknife Gold Project, NWT, Canada.

Gold assays from trenching at Clan Lake have returned positive results including 13.12 gpt gold across 10.0m (including 48.88 gpt across 2m) and 0.99 gpt gold across 45.0m. The trenches were blasted into extensions of the Main Structure and reached out 200 to 660 metres east of the existing 254,000 ounce gold resource (NR S.10 R.2 January 22, 2009) calculated on the Clan Zone.

"The confirmation of large areas of gold enrichment together with significant segments of higher grade gold mineralization is very good news" reports Dr. D.R. Webb, President & CEO of Tyhee Development Corp. "The trench results demonstrate good grades over good widths at significant step-outs along strike from our existing resource; provide better definition of areas to be drilled in Tyhee's program to commence after freeze-up this year, and will guide further work through 2010 and beyond." Webb adds that "The Main Zone is the best defined zone but is only one of the seven zones at Clan Lake. In addition, earlier this month we reported new drillhole results which are being incorporated into our resource database to facilitate a revised resource calculation on the Main Zone before the end of this year."

Elsewhere on our Yellowknife Gold Project, field work on the Preliminary Feasibility Study (PFS), being conducted on the Ormsby and Nicholas Lake Zones has been completed for 2009. Metallurgical samples have been shipped for processing and environmental studies.

Permitting work is being conducted in conjunction with the above mentioned PFS.

Tyhee Development Corp. is a gold exploration and development company focused on the historic Yellowknife Gold Camp, NWT, Canada. It is the largest property holder in this historic camp and has the largest exploration and development program underway in the region. Its principal asset is the Yellowknife Gold Project that includes the Nicholas Lake and Ormsby Gold Zones, the Goodwin Lake Property (13 km south of the Ormsby Zone), and the Clan Lake Property (27 km south of the Ormsby Zone). All are located on mineral claims and mining leases 70 to 90 km north of Yellowknife, NWT. (Note: only Nicholas Lake and Ormsby Zones have been included for permitting purposes).

Tyhee completed fire assays on samples using 30 gram aliquots with ICP-ES finish for gold analyses (Group 3B), prepared at Acme Analytical Laboratories Ltd. in Yellowknife, and finished at Acme Analytical Laboratories Ltd in Vancouver. A semi-quantitative multi-element analysis is run on 0.5 gm aliquot samples leached in a hot aqua regia solution and measured using ICP-ES techniques (Group 1D). Tyhee conducts a rigorous QA/QC program of inserting blanks and duplicates in the field and standards in the laboratory. The laboratory also conducted their own independent QA/QC program including inserting their own standards and rerunning samples from pulped material and reject material. These results were provided to Tyhee. All standards, duplicates, blanks and check assays returned acceptable results. Mr. V. Pratico, P.Geol., the designated QP within the meaning of NI 43-101, has reviewed this release and approves of its content.

Tyhee's shares trade on the TSX Venture Exchange under the symbol "TDC". For additional information, including a map showing the location of assays reported in this release, please visit the Company's website, www.tyhee.com.

This news release contains forward-looking statements, which address future events and conditions, which are subject to various risks and uncertainties. The Company's actual results, programs and financial position could differ materially from those anticipated in such forward-looking statements as a result of numerous factors, some of which may be beyond the Company's control. These factors include: the availability of funds; the timing and content of work programs; results of exploration activities and development of mineral properties, the interpretation of drilling results and other geological data, the uncertainties of resource and reserve estimations, receipt and security of mineral property titles; project cost overruns or unanticipated costs and expenses, fluctuations in metal prices; currency fluctuations; and general market and industry conditions. Forward-looking statements are based on the expectations and opinions of the Company's management on the date the statements are made. The assumptions used in the preparation of such statements, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.

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                Results of trenching on Clan Lake, 2009
               -------------------------------------------
                Trench       Length         Gold Grade
                             (metres)   (grams per tonne)
               -------------------------------------------
                C1             14.5           0.45
               -------------------------------------------
                W1             10.0           1.01
               -------------------------------------------
                W2             45.0           0.99
               -------------------------------------------
                  incl         16.0           1.56
               -------------------------------------------
                  incl         12.0           1.24
               -------------------------------------------
                W3             10.0          13.12
               -------------------------------------------
                  incl          2.0          48.88
               -------------------------------------------
                W5              3.0           1.69
               -------------------------------------------
                HS1             1.0           0.68
               -------------------------------------------
                HS2            10.0           2.21
               -------------------------------------------
                E1             14.0           0.53
               -------------------------------------------
                Note: trench HS3 did not obtain any significant
                gold values. Total meterage sampled is 184.5 m
    >>

For further information: Tyhee Development Corp. David Webb, President and CEO, Tel: (604) 681-2877, info@tyhee.com; Envoy Strategic Partners, Jay Bedard, Tel: (647) 344-1768, jay@envoystrategicpartners.com

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