Some of you might be wondering: “What is UMS? It sounds like someone is mumbling the word umm in disgruntled thought” or “Is this actually going to take place underground in the sewers? Am I going to need galoshes?” Well, your friends at Ultra5280 are here to help. UMS is Denver’s premier indie music festival, featuring over 400 different local and national acts with a diverse lineup the entire family can enjoy.