Run 5K Run
10:30 amAll the winter fun in a walkable, dog-friendly 5K.
- Terrain
- 50% trail, 50% paved
- Time
- 35-75 min
- Level
- Welcoming
Best forFirst-timers, walkers, families and runners with dogs
See course details →February 7, 2027 / Lyons, Colorado
Take on Winter.
Let’s Rally.
Old Man Winter Bike Rally & Run is a must-do Colorado endurance festival with mixed terrain adventures for all levels of riders and runners.
“Top Ten MUST-RIDE Gravel Events”— Bicycling
Old Man Winter · 2027
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Join the priority list for ticket announcements, event updates and community access.
February 7, 2027
- Get first access to registration
- Get invites to free community rides, runs, and parties
- Join the AF Events Strava Club
Take on winter together. Join our Strava club to connect with the rally community.
Join our Strava club ↗YOUR NEXT CHALLENGE
Course distances, start times and formats below reflect the previous event guide and are subject to 2027 confirmation.
Eight ways to take on Old Man Winter
Choose your
Winter adventure.
Courses for beginners, serious athletes, and pros. There is a start line perfect for you. Compare terrain, time and experience level before you commit.
Run 
Run 10K Run
10:00 amA scenic winter tour of trails, red rock and gravel paths.
- Terrain
- Trail, gravel and paved
- Time
- 35-90 min
- Level
- Intermediate
Best forRunners who want a classic distance without an all-day commitment
See course details →
Run Half Marathon
9:30 amA mostly flat tour of rivers, gravel paths and double track.
- Terrain
- Road, gravel and trail
- Time
- 1.5-3.5 hr
- Level
- Big day
Best forDistance runners chasing a memorable winter half
See course details →
Bike 23 Mile Bike
12:30 pmDip a tire into mixed-terrain winter riding.
- Terrain
- Gravel and paved roads
- Time
- 1.5-3 hr
- Level
- Welcoming
Best forCurious gravel riders and confident recreational cyclists
See course details →
Bike OMW pick40 Mile Bike
12:00 pmTHE classic Boulder County gravel route.
- Terrain
- Mixed gravel and paved
- Time
- 1.5-3.5 hr
- Level
- Challenging
Best forExperienced road or gravel riders ready for winter
See course details → Bike OMW pick75 Mile Bike
9:00 amThe legendary course: canyons, snow, Rowena single track, and grit.
- Terrain
- Gravel, road and snowy trail
- Time
- 3.5-6 hr
- Level
- Expert
Best forExperienced riders who want the full Old Man Winter story
See course details →
Combo Mini Run/Bike Combo
See event scheduleA 5K run and a 23-mile ride. One big winter celebration.
- Terrain
- Trail, paved paths and gravel
- Time
- Run + ride
- Level
- Double adventure
Best forAthletes who want a shorter run-and-ride challenge
See course details →
Combo Run + Bike Combo
10:00 amRun first, ride second, celebrate twice.
- Terrain
- Trail, gravel and paved
- Time
- 3-5 hr
- Level
- Multi-sport
Best forSolo athletes or relay teams who refuse to choose
See course details →Still split between two?
Compare every challengeTHE OTHER HALF OF THE DAY
THE WARM WELCOME.
LET'S CELEBRATE.
The run and ride are only half the story. Find your friends and settle in for the epic after party.
01Super fun aid stations↗
Friendly faces along the way. A shared adventure from start to finish.
02Share your battle stories↗
Swap stories, get cozy, and celebrate your accomplishment.
03Stay for the encore↗
The finish-line party includes great bands, s'mores, saunas, and more.
04Heat it up↗
There's nothing like a post-workout sauna and we've got them (along with cold plunges) at OMW!
The Winter-Ready Event Plan
We plan for
any weather.
You earn the story.
You never know what weather Old Man Winter will send our way on race day. Rest assured, our event team monitors roads, coordinates with local authorities and has shorter route options ready if conditions change.
Before race day
Course and safety updates go directly to registered participants by email.
If it's really coming down or there is deep snow
Courses will be modified so the adventure continues. Safety wins every decision.
If weather turns mid-event
Bike routes can be shortened in town while safe run routes continue.
If you want to opt out
Entries can be transferred to another category or person at no charge.
KNOW BEFORE YOU GO
01 What happens if winter weather gets serious? +
Old Man Winter is built for winter conditions, but safety comes first. Boulder County law enforcement may postpone the event if roads become unsafe. If conditions change during the event, the team can move riders onto a shorter in-town route while the run continues where safe. Registered participants receive updates by email as early as possible.
02 Can I transfer or defer my entry? +
Entries can be transferred to another person at no charge through Events.com. The historic policy has also offered a discounted deferral to the following year before a published deadline. The final 2027 policy will appear here before registration opens.
03 What bike should I ride? +
Gravel and cyclocross bikes are the most common. A road bike with wider tires can work in dry conditions, while a fat bike delivers maximum smiles when snow arrives. Tires at least 25mm wide are recommended, with tread selected for the forecast and course conditions.
04 Is this race timed? +
Yes. Every course is timed, but this is a rules-of-the-road event and all traffic laws apply. Safety sections on the long course may be untimed so riders can descend cautiously and stop at every sign.
05 Can my friends and family join the party? +
Absolutely. The finish-line party is free and open to the public, with food and drinks available to buy plus family activities and the free kids bike race.
February 7, 2027 / Lyons, Colorado
Ready for
Epic Winter Adventure?
Get the ticket announcements and event updates.
Your next adventure starts with a place on the list.