Castle Rock Breweries Rock Their Collaboration Fest Beer

The 2019 Collaboration Fest is coming to Denver on March 16! This is the 6th year of this festival, celebrating Colorado craft beer and their camaraderie with each other, and brewers near and far. More than 200 craft breweries are making new collaboration beers for this event, including all five of our local neighborhood Castle Rock breweries. We crashed their Castle Rock collaboration brew day recently and can’t wait to taste what “the Rock” brewers have cooked up.

Castle Rock Collaboration Beer

Brewing of the Castle Rock brewery collaboration happened at Burly Brewing Company, under the watchful eye of Burly’s head brewer Jim Stinson. All four of the other Castle Rock breweries (Rockyard Brewing Company, 105 West Brewing Company, Iron Mule Brewing & Wild Blue Yonder Brewing) were on hand. According to Jim, this beer was a real collaborative effort, with each brewery bringing ideas to the table and ingredients to the brew kettle. Fittingly, our Castle Rockers decided to make a steinbier.

Jim Stinson, Head Brewer at Burly Brewing Company

Steinbier, which means “stone beer” in German, was developed centuries ago by German farmers, long before large metal brew kettles were readily available. Stones were superheated over the fire and dropped in the mash tun to heat the mash, and later, to boil the wort. These hot rocks work to caramelize the sugars in the wort instantly, giving the beer a unique flavor.

Obviously, Burly Brewing Company has a more advanced setup than your typical German farmer from days of yore. This collab beer was made the new-fashioned way, and hot rocks were added at the end of the boil to caramelize the wort. Sadly, we couldn’t stick around long enough to watch the hot stone action. Fortunately for us, 105 West brewer Kjell Wygant provided a few photos so we could see what we missed.

Our thanks to Burly Brewing and the entire group of Castle Rock brewers for letting us spend some time with you on your collaboration brew day. We cannot wait to taste the beer at Collaboration Fest!

More Castle Rock Collaborations

This Castle Rock Steinbier is just one of five collaboration brews that feature our hometown beer makers. At the 2019 Collaboration Fest be on the lookout for these other collaborations featuring our hometown brewery heroes:

  • Burly Brewing Company & 105 West Brewing Company
  • Jagged Mountain & 105 West Brewing Company
  • Wild Blue Yonder Brewing Company & Left Hand Brewing Company
  • Peak to Peak Tap and Brew & Rockyard Brewing Company
A preview of the Burly Brewing & 105 West Brewing collab beer, an Imperial Half & Half

Explore Castle Rock Craft Beer

You don’t have to wait for Collaboration Fest to try some Castle Rock beer. Come visit the town during Castle Rock Craft Beer Week, February 25 to March 3, 2019. Pick up a Castle Rock Craft Beer Week passport and earn prizes by enjoying beers at all five breweries during the week. There will be free trolley rides between the breweries on Tuesday, Thursday, and Saturday.

For more details on Castle Rock Craft Beer Week and to view the trolley schedule visit the event page at

Join Us at the 2019 Collaboration Fest

We know there’s a lot of beer festivals to choose from each year, but we promise there isn’t anything like the Collaboration Fest. Come out and enjoy some incredible one-of-a-kind brews; we guarantee you won’t find this beer selection anywhere else. We haven’t missed a Collaboration Fest yet, and each year they just keep getting better.

The 6th Annual Collaboration Fest

Saturday, March 16, 2019
3 PM – 6 PM General Admission
2 PM entry for Connoisseur ticket holders

Hyatt Regency Denver
650 15th St, Denver CO 80202

Tickets & More Information
Check out a full lineup of participating breweries and get your tickets to the festival by visiting

About Collaboration Fest
The Collaboration Fest is brought to you by Two Parts and the Colorado Brewers Guild. It’s the headline event to kick off Colorado Craft Beer Week (March 16-23). Find even more Colorado Craft Beer Week events near you by visiting