Tyhee obtains long intersection of gold mineralization at their premier, Yellowknife Gold Project, NWT Canada

Diamond drill core from 16 archival holes that had not been sampled in their entirety were obtained, relogged and sampled (appended) returning 2.34 gpt over 38.0 metres (m) in CL01 including 2.96 gpt over 15.0 m and 4.18 gpt over 7.5 m; 1.55 gpt over 45.0 m in CL029 including 4.70 gpt over 7.5 m and 2.53 gpt over 10.5 m.

"The high-grade assays from the recently discovered gold zone that have yet to be diamond drilled is encouraging" reports Dr. D.R. Webb, President & CEO of Tyhee Development Corp. "The Cub and Morel Zones have large surface expressions of quartz veined and sulphide mineralized volcanic rocks (300 m x 20m and 800 m x 70 m respectively) so we see tremendous tonnage potential. Additionally, the diamond drill results provide information on the Main Zone to the northwest as well as extend it to the east by at least 30 metres. We will incorporate these drillholes into our resource database to facilitate a revised resource calculation on the Main Zone before the end of this year."

Assays from an additional four diamond drillholes as well as results from over 200 metres of trenching on the Main Zone extensions, 400 m east of any existing drillholes, are expected over the next few weeks.

Elsewhere on the Yellowknife Gold Project, the field work portion of the Preliminary Feasibility Study (PFS) is nearing completion for 2009. Drilling at Nicholas Lake and on the Ormsby Zone and on infrastructure sites are complete, and crews and equipment have demobilized for the season. Metallurgical samples are being shipped for processing and environmental studies, and hydrology and power studies are ongoing.

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 which 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 of which 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 and 6), 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, 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.

	    Neither the TSX Venture Exchange nor its Regulation Services Provider
	    (as that term is defined in the policies of the TSX Venture Exchange)
	    accepts responsibility for the adequacy or accuracy of this release.

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	    Drillhole                      From         To       Interval     Grade
	                                 (metres)    (metres)    (metres)   gpt gold
	    -------------------------------------------------------------------------
	    CL01                            24.5        62.5        38.0        2.34
	    -------------------------------------------------------------------------
	      incl                          47.5        62.5        15.0        2.96
	    -------------------------------------------------------------------------
	      incl                          55.0        62.5         7.5        4.18
	    -------------------------------------------------------------------------
	    and                             68.5        70.0         1.5        1.67
	    -------------------------------------------------------------------------
	    CL02                            16.0        34.5        18.5        1.83
	    -------------------------------------------------------------------------
	      incl                          30.0        34.5         4.5        6.83
	    -------------------------------------------------------------------------
	    CL028                          104.0       105.0         1.0        7.93
	    -------------------------------------------------------------------------
	      incl                         176.5       177.5         1.0        1.25
	    -------------------------------------------------------------------------
	    CL029                           57.5       102.5        45.0        1.55
	    -------------------------------------------------------------------------
	      incl                          77.5        85.0         7.5        4.70
	    -------------------------------------------------------------------------
	      and                           92.0       102.5        10.5        2.53
	    -------------------------------------------------------------------------
	    CL031                          128.5       131.6         3.1        2.36
	    -------------------------------------------------------------------------
	    CL032                           19.0        35.0        16.0        0.70
	    -------------------------------------------------------------------------
	    CL033                           35.0        37.5         2.5        1.80
	    -------------------------------------------------------------------------
	      and                           40.5        51.8        11.3        1.32
	    -------------------------------------------------------------------------
	    CL039                           13.0        14.0         1.0        1.54
	    -------------------------------------------------------------------------
	      and                           31.0        32.6         1.6        3.40
	    -------------------------------------------------------------------------
	    CL040                           60.8        63.1         2.3        1.24
	    -------------------------------------------------------------------------
	    CL044                           54.9        56.1         1.2        1.02
	    -------------------------------------------------------------------------
	    Ddh CL030, CL035, CL038, CL041-CL043 did not intersect significant
	    mineralization