Defiance Challenge
About this race
The Defiance Challenge isn’t just an endurance event, it’s a heart-pounding, adrenaline fueled showdown that tests grit, skill, and sheer determination! Open to expert skiers and riders ages 6 and up, this epic two-person team race pushes competitors to their limits as they battle to rack up the most runs in a grueling 10-hour marathon on the slopes.
The bar is set high: the legendary record of 49 runs—an astonishing 66,792 vertical feet—was established in 2020 by the unstoppable duo, Aidan Corcoran and Nate Grosscup. Can you and your partner rise to the occasion and shatter this milestone?
The action kicks off at 7 a.m. sharp outside the main Sunlight lodge with a Le Mans-style start that’s as chaotic as it is thrilling. At the sound of the starting gun, racers explode into motion, sprinting to their waiting skis or snowboards, snapping into their bindings, and charging toward the Segundo chairlift. From there, it’s a non-stop, high-speed adventure as teams conquer 40 challenging routes, including every double black diamond Sunlight has to offer.
Whether you're here to make history or just prove you’ve got what it takes, the Defiance Challenge promises a day of unforgettable thrills and fierce competition. Are you ready to defy the limits? Let the countdown begin!
Pick your distance
Skiing
Defiance Challenge
Please be aware that the mountain is open to general public so racers must ski or ride in control at all times. Stay hydrated and stay fueled Please check all ski and ride equipment before the race to make sure it is up to legal safety standards. Have fun and stay stoked!
Race-day daylight
We have no recorded weather for Glenwood Springs yet, but sunrise and sunset follow from the venue and the date.
The sun rises at 6:35 AM and sets at 6:05 PM local time (MST) in Glenwood Springs on March 5, 2027 — 11h 29m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Other races near Glenwood Springs
Different organizers, within 40 miles, in the next three months
Moonlight Race Series
Halloween Hustle for Charity
Jingle Jog 5k and Fun Run
Summit for Life
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 7 Glenwood Springs events
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