Warning: these photos are graphic. You may need to look away and take deep breaths. Denver brought out the worst of its eye-searing Christmas cardigans on Saturday at City Park for the 2012 Ugly Sweater Run, which included contests for everything from best mustache to ugliest sweater, hot-chocolate aid stations and plenty of reindeer games.
Check out all the carnage in our full 2012 Ugly Sweater Run slide show.
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