Collaboration Fest, which is Colorado’s most interesting and unusual brewing showcase, takes place Saturday, March 25, in Westminster and features more than 120 different beers that were brewed specifically for the festival. Founded in 2014 by the Colorado Brewers Guild as a way to highlight the camaraderie between the state’s craft beer producers, the signature festival teams brewers together to highlight their connections and creativity. A few of the trends this year to note: There are about 35 lagers in the mix, ranging from the classic pilsners to some wild and wacky Baltic porters, Czech dark lagers and bocks. Ingredients truly run the gamut, from seaweed, Chinese plums and spruce tips to shitake mushrooms, dandelions and kitchen spices. The use of Thiolized yeast strains, which are designed to release and enhance flavor and aroma compounds during fermentation. Collaboration Fest takes place at The Westin Westminster, 10600 Westminster Blvd., on March 25 from 3 to 6 p.m.