Mom will be so proud that you're staying active. Show her how thankful you are of everything she's done by dragging her along for the 5K run. In fact, bring the whole family together to earn discounted rates on registration. This active holiday celebration also includes free admission to the Denver Zoo, raffle prizes, and awards for the top female and male finishers. Bring old cell phones for safe recylcing and retired gym shoes for Soles for Shoes, which donates shoes to those in need across the world. Sun 9 a.m.