Where's Blunk when you need him?
Horsetooth Reservoir near Fort Collins looks great, but not actually been there.
Bouldering on Flagstaff Mountain near Boulder is OK, wasn't crazy about roack quality though.
Eldorado will be roasting at that time of year, some cooler sport climbing in Boulder Canyon.
There is some bouldering in Wyoming written up in Stone Crusade, but never actually climbed any of it.
There are tons of guidebooks to climbing in the area, mostly of the tedious Falcon type. I would get to some one of the larger climbing shops (Neptune is probably best, but REI also has a good selection) in Boulder and have a look to see which ones will be useful, rather than buying them at inflated prices over here.