Colorado Brewers Guild's Collaboration Fest Pours 120 Exclusive One-Off Beers

One hundred sixty-six breweries descended on the Westin Westminster on April 4 for the Colorado Brewers Guild's Collaboration Fest, presented by On Tap Credit Union, pouring more than 120 beers that will likely never exist again. From 2 p.m. until last call at 6 p.m., the festival floor held everything from "Bock of Ages," a chile bock mashup from Bent Barley Brewing Co. and Danico Brewing, to "Morally Dankrupt," a west-coast IPA brewed by Colorado's Cannonball Creek alongside California's ISM Brewing. Black Shirt Brewing and Westminster Brewing contributed "Don't Tease Me, Bro," a tea pale ale that illustrated exactly how far outside the standard tap list these partnerships push.

The festival's format is deliberately constraining in the most generative way possible: every pour on the floor had to be co-brewed by at least two breweries and made exclusively for the event. No existing SKUs, no taproom regulars dressed up with new labels. Twenty of the 166 participating breweries traveled from out of state, including ISM from California, making Collaboration Fest something closer to a national showcase than a regional guild event.

Carrie Knose Wilson, Communications Manager for the Colorado Brewers Guild, put the creative logic plainly: "Collaboration Fest is a creative cross-pollination of breweries, which creates a unique celebration of craft beer. Craft brewers champion each other through sharing best practices, supplies, and ingredients, and the result is what you see at the festival."

For longtime participants, that result is as much about the window it opens as the beer itself. Dave "Beef" Mierra, former owner of Boggy Draw Brewery in Sheridan and a Collabfest veteran, described the stakes of the format: "You might find one of the collab beers at a tap for about a month after, but then they're gone. It's what craft beer is supposed to be: A full experience of a one-off beer."

The event's track record as a creative proving ground runs deeper than the tap list. Wilson noted that past editions of Collaboration Fest served as launching pads for Brut IPA, Cold IPA, and early experimentation with thiols for flavor enhancement, all before those techniques became standard conversation in brewery taprooms. Process stories from previous years have included beers brewed mid-rafting trip and recipes built around ramen or smoked pork, the kind of R&D that wouldn't survive a standard quarterly SKU review.

For the Colorado Brewers Guild, the event also carries direct financial weight: Collaboration Fest functions as a fundraiser for the Guild's ongoing advocacy and industry support work, meaning the festival's sold tickets flow back into the organization that coordinates the industry it celebrates.

The pre-announced beer list, a Collabfest tradition, let attendees map out a tasting route before they set foot in the Westin. With 120-plus beers and four hours to work through them, having a game plan going in was less a luxury than a necessity.