TYHEE DEVELOPMENT CORP

Tyhee Development Corp. 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. 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.