12 Hours of Sunlight
About this race
The mountain is calling. How will you answer?
The 12 Hours of Sunlight returns in 2027 for its third year btter than ever and is ready to test what you’re made of. For 12 relentless hours, determination becomes momentum, teammates become family, and every lap asks the same question: Do you have another one in you?
Take it on solo or share the challenge with a team of two or four. Whatever your approach, this is more than a race. It’s a journey into the night, a battle against the clock, and a chance to discover how far you can go when your legs say stop but your spirit says climb.
The Challenge
Race to complete as many laps as possible in 12 hours on Sunlight’s 1.3-mile Sun King uphill route, gaining 1,800 vertical feet with every ascent.
Skin up. Ski down. Repeat.
Compete as:
An individual
A two-person team
A four-person team
Race Check-In
Every racer will receive a bib. Bib pickup details will be announced closer to race day. Members of the same team will share a bib number.
Racer swag will be distributed at the conclusion of the race.
Required Gear
Every racer must carry and use:
A headlamp(for the early and late laps)
A helmet
Downhill-rated skis or a splitboard
Helmets are mandatory on every downhill segment. Snowshoes and uphill-only skis are not permitted.
Hydration and Fuel
A fully stocked hydration and fueling station will be located at the start/finish line, with a variety of race-day essentials to help keep you moving throughout the challenge.
Drop-Bag Zones
Racers may use either of two convenient drop-bag areas:
An outdoor zone at the start/finish line
An indoor zone in the lodge, approximately 250 feet away
The Finish
When the final lap is complete, gather in the lodge for food, drinks, giveaways, and a well-earned celebration. Top individuals and teams will receive prizes and lift tickets for the 2025/26 season.
Important Registration Information
There will be no race-day registration. Secure your place in advance.
Racers under 18 must have a parent, coach, or guardian present for the entire race.
The clock will keep moving. The mountain will keep asking. And somewhere between the first climb and the final descent, you may meet a stronger version of yourself.
Answer the challenge. Register today and see how many times you can rise in 12 Hours of Sunlight.
Race Map
Pick your distance
Skiing
12 Hours of Sunlight Individual
All racers must have a headlamp and a helmet to compete in this event. Helmets must be worn during all DH segments of the race. Racers must also have DH rated skis or a split-board for this event. Snowshoes and uphill only skis will not be allowed.
12 Hours of Sunlight Team of 2
Note: $70 per team member All racers must have a headlamp and a helmet to compete in this event. Helmets must be worn during all DH segments of the race. Racers must also have DH rated skis or a split-board for this event. Snowshoes and uphill only skis will not be allowed. Racers must alternate laps to qualify for a final result. If one racer drops out or the order is broken then the team's total lap's will be tallied at that point.
12 Hours of Sunlight Team of 4
Note: $50 per team member All racers must have a headlamp and a helmet to compete in this event. Helmets must be worn during all DH segments of the race. Racers must also have DH rated skis or a split-board for this event. Snowshoes and uphill only skis will not be allowed. Teams of 4 must submit their lap order that they will follow during the race. If one racer drops out or the order is broken then the team's total lap's will be tallied at that point.
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 7:23 AM and sets at 5:18 PM local time (MST) in Glenwood Springs on January 23, 2027 — 9h 54m 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.
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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
The Roaring Fork Splash for Cash, a fundraiser for the Aspen Swim Club
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, 6 Glenwood Springs events
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