July at the Fat Tire Festival that used to be in Crested Butte, CO was like a faireyland.
There were wild flowers everywhere when I was there in July of 1990 and on July 4, 1990 I was snowed on up in one of the 12,000 foot passes.
Seems like it's now in June so maybe they know something. I wouldn't recommend riding at that altitude without friends or riding buddies along. At the very highest spots you can get so dizzy that it's hard to ride on the trail. Funny how the body needs that oxygen stuff.
http://www.ftbw.com/