The second annual Collaboration Fest took place over the weekend at Sports Authority Field at Mile High, offering one-of-a-kind beers brewed by pairs, trios and even larger groups representing local and national craft brewers. This year, more than 70 collaborative beers were served from pouring stations set up inside the stadium's concourse. Last year's event, held inside the Curtis Hotel downtown, sold out quickly and was packed to the rafters, so this year event coordinator Imbibe made sure there was plenty of room. Photographer Danielle Lirette was on the scene to photograph the brewers, beers and drinkers who showed up to enjoy the brews and the weather from sunny stadium seats. See our complete slideshow for more of the action.