Welcome to YT! I am in Colorado too! I have two yorkies, Starsky and Shylah. Starsky will be 2 in February and Shylah is 9 months. I think Starsky is going nuts with the snow. He wants to run the perimeter of the back yard so bad!! He has made himself a path to the tree, where he can bark at the squirrels. I live in Highlands Ranch and if you are interested I belong to a Denver Yorkie playgroup that usually meets once a month. We have met quite a bit up in your area too.
Here's a picture of Starsky and his "Path".