Yeah, I'll have to get up there and look at them - down here on the flats I don't think there are many aspens. There are a few different deucidious trees, but not as many kinds as the northeast.
Jen, I don't know if you have a chance to get out and about but I have in my mind that I would love to come up and take you out sometime. It may not be exactly your cup of tea but a really good friend of mine is the band leader at the Flying W Ranch in Colorado Springs. They play "western" music. Not to be confused with "country." It is a good time to go and eat and hear the band at the Flying W and I want to come up and get you and take you there one of these days.
Here is the website for the Flying W:
http://www.flyingw.com/
On that site you can also hear the band, the Flying W Wranglers. They are great guys. If you happen to get there before I come up to take you be SURE and tell the bandleader Vern that Leggs said "Hello!" and I will not marry his uncle!!! :-)
I love 'em, but aspens are the weeds of the tree world. They propagate via their root systems- they send out runners and up springs a new tree. The new tree has the same genetics as the 'parent' and will turn the same color at the same time. You'll see these huge blocks of fall color that take up the entire mountainside cuz' it's all really the same tree.