Trick-or-doughnut! Grab your goblins and ghouls and head to Krispy Kreme on Halloween, Monday, October 31 for a sweet treat. All costumed customers will get a FREE doughnut (any variety) — no purchase necessary. (For safety reasons, no weapons — fake or real — are allowed.) Limit one doughnut per customer. There are only three locations in Colorado — Denver, Lone Tree and Thornton. Be sure to check out our “Halloween Happening on the Cheap” for spooky fun for kids and adults alike.