First off, I would love to. However, I am really bad when it comes to Iteneraries. I'm also not familiar with the locations of all the breweries. Time management for me just doesn't happen very well. Some internet searches will yield good results for you, but allow me to make recommendations.
Man, there's a ton of good ones here. I recently posted "A day of brewery tours" in the drunken mumblings and ramblins, it goes better into the following three I can recommend. I can't really make a solid itenerary right now, though. There's a lot of maps of stuff in the boulder area. I know they're at Redstone, and I'm certain elsewhere. These are easy-to follow maps with the "cool places" clearly marked.
Flying Dog is in Aspen. This is one of those places I hate going to. I didn't know this when I said I would eventually tour there. Aspen is a short way into the hills. I don't know what else is up in Aspen for breweries, but you might want to try an internet search. It's about an hour drive outside of everything here. I believe the tours start at 2pm and 5pm.
I guess I'll start with the boulder area, since it's where my experience is.
First, a disclaimer. Boulder is 50 square miles surrounded by reality. It was a haven for hippies in the sixties, but now it's this weird hippie-yuppie town. People with money acting like people without. It's still pretty cool though. With the college, there are so many oh-so-fine women running around boulder it'll make your head swim.
Only place I know of "Tree Psychiatrists". Seriously. I've got a story behind that.
Redstone Meadery is excellent if you want to see a meadery. The tour was great, and the guide was hot. The free samples were top-notch. Make sure you get there around noon for the tour. The samples of the private reserve are $3 an ounce, but they are SO worth it (the stuff is $50 a half-liter. We bought one for new years). This year is a beautiful red raspberry mead.
We've got several places right off of pearl street mall in boulder. You can park and check out several places within walking distance. Mountain Sun, Redfish, BJ's restaurant and brewery, and several others.
Mountain sun is my next recommendation. There's no real tour, but you can stand by the glass window and watch the brewery all you like. Great stuff. Their sampler is wonderful. You pick six beers from their extensive menu, and they come out in 8oz glasses. The three of us bought two samplers. The beers are great. I haven't tried the food here, but the beer is so like homebrew it's unreal. They don't have a website, but the following is a review and lists their brews. The nitro-charged cream stout is the BEST!
BJ's brewery and pizza is just down the street. Great pizza. Their sampler is a lot of 6oz glasses (we ordered two of them - it was a wall of beer!). I liked the brews in mountain sun better, but these were excellent. They have a hefeweizen and american amber that's unreal. The pizza here is not to be missed.
Redfish is one I have sadly missed, also within a couple minutes on foot. I hear they've got a crawfish gumbo that'll knock your socks off, and a real neat tour. They are closed on Saturdays.
Avery is pretty close as well, and I love their beers. I've not toured there yet, though. The boulder beer company is here as well. That hazed and infused is a crazy hoppy amber.
In Fort Collins we've got New Belgium (fat tire, baby!), Odell (90 shilling!), Coopersmith's pub and brewing, Coner O'neil's Irish pub and restaurant, Big Horn Brewery (Buttface amber, heh heh). Fort Collins is about a 45 minute drive from boulder, depending on your route (diagnal highway to I-25, best bet)
And, for the little kids, there's Budweiser. They can see the clydesdales. Okay, I've actually heard the tour is really good, if you're interested in the mass-production thing. Bud is why Fort Collins is #2 nation wide in beer production.
I don't know anything about the denver breweries. I just don't like going downtown, so I don't know about them. There's a lot of them real close to coors field.
I've spent an hour on this already. Let me know if you want more information or anything, because I need to go. Also, let me know when you'll be out here.