2015 Dubuque on Ice Brewfest Guide. Dubuque, IA #CraftBeer #BeerOnIce Official Sampling Guide for the 4th Annual Dubuque on Ice Brewfest. Saturday, February 21, 2015. See the product list for more details and additional information. Note: Missing from program include: Rush River Brewing Company, Rhinelander Brewing Company and Madhouse Brewing Company