Below is a link to an article about the top 10 best cities for beer. Good list with great information. Being a Colorado resident, I can say it's great that Fort Collins made the list, but Denver belongs on there too.
My personal favorite brewery here in Colorado is the O'Dell Brewery up in Fort Collins.Coming from a state with A LOT of amazing beer, this means a lot [about my tastes]. Check it out if you're ever out my way!