All-Out Polar Prowl

Get ready to kick off your athletic year at the 14th annual Polar Prowl on Saturday, January 9, 2027! 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!

This family- and dog-friendly event includes:

The flexibility of running or walking 5K, 10K, or half marathon distances to meet your fitness goals and so you can participate with your friends and family
A warm gaiter that you’ll use all season long, full-color medal, and event-specific bib for all distances
Chip timing and accurately measured courses
Awesome post-race meal including breakfast burrito and chocolate milk
Lots of free course and finish line photos

We are inclusive and support athletes of all abilities, including no time limit on the run/walk

Save 25% by registering for all three All-Out winter events at the same time!

Doug Demusz

Doug Demusz, a passionate lifetime member of Colorado's outdoor community who enjoys backpacking, adventure cycling, backcountry skiing, along with creating music, and a well rounded appreciation of literature, and community events.