Get ready to kick off your athletic year at the 13th annual Polar Prowl on Saturday, January 10, 2026! Hosted by All-Out at the Stenger Sports Complex in Arvada, CO, this is Denver's first half marathon of the year and an official BOLDERBoulder qualifying event! Choose your challenge between a 5K, 10K, or half marathon and enjoy a relatively flat course that meanders on the Van Bibber Creek Trail, offering breathtaking views of Arvada's open spaces and Table Mountain. This course is super spectator-friendly and you have a good chance for a personal record! Don't forget to dress up for our penguin costume contest with exciting prizes from our beneficiary, Penguins International!