Denver's low key, low cost multisport winter series!!! The Chilly Cheeks Winter Duathlon series is composed of three run-bike events at the Cherry Creek Reservoir. We provide a marked and marshaled course, accurate timing, light refreshments, and some fun mid-winter competition in the heart of Denver. Enter one race, or all-three - it's up to you. No, you won't a t-shirt or a gourmet meal - but you won't be out the big bucks either. Register for all three duathlons by December 19th and get a pair of Chilly Cheeks Sweat Pants - perfect for pulling on post-race or for lounging around the house. These are always a big hit, so they're back for the 2014/2015 series!