Here's a great resource for high-altitude cooking. Scroll down a bit, or click through the link in the list at the outset, for cooking meat and poultry at high altitudes:

http://www.fsis.usda.gov/factsheets/high_altitude_cooking_and_food_safety/index.asp#5

Have fun and Happy T-Day!! ;o)

Here's a link to the Better Homes and Gardens interactive roasting guide. It's really handy!
http://www.bhg.com/recipes/how-to/cooking-techniques/the-interactive-roasting-guide/