 MAY THE FROST BE WITH YOU Â
THE COLDERBOLDER 5K
13 Invitational Races, One Open Race and a Walking Wave.
You’ll be invited to join by email if you ran a previous COLDERBolder or BOLDERBoulder.
Just don’t get left out in the cold, this event always sells out.
Registration opens to the public October 1st.Â
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Join Us Saturday Dec. 5th on CU Campus
Earn that Cold Medal and enjoy all the in-person merrymaking, including our Holiday Finish Fest with Burritos, Doughnuts, Coffee, Hot Cocoa and more!
 THE COLD MEDALS EXPLAINEDÂ
14 races + 1 Walking wave
You’ll be invited to join by email if you ran a previous COLDERBolder or BOLDERBoulder.
The First 13 Invitational Races Are Organized by Pace.
Those who finished the 2025 COLDERBolder or 2026 BOLDERBoulder will be invited by email.
Everyone earns a medal, but the top 3 finishers in each race earn a special Cold Medal. Everyone has a fair shot to be in the top 3 because you only run with people your speed. For example, if you ran the BOLDERBoulder in 52 minutes your race only includes people who finished between 52:00-53:59 minutes. This is truly your chance at eternal fame and racing glory!Â
Open Race
The Open Race is for any speed, but it’s more fun to do the COLDERBolder alongside people your pace. Check your last BOLDERBoulder finish time, you may qualify to join one of the first 13 invitational races.
Walking Wave
The Walking Wave is for those who just want a festive stroll through CU campus and our winter wonderland. This is not a race (no 1st, 2nd, or 3rd place Cold Medals), but all will receive a medal!
Virtual Race
We offer virtual registration for those who can’t make it.
 $66 PACKAGES INCLUDEÂ
Official ColderBOLDER Shirt & Winter Beanie
Race Medal (after completing your 5K)
Official ColderBOLDER Bib with RFID Timing Tag
Holiday Finish Fest: Burritos, Doughnuts, Coffee, Hot Cocoa and More!
Virtual registrations are also available.
There is no race day registration for the COLDERBolder. It sells out every year.
Can’t make it?
No problem!
If you sign up and can’t participate,
you can roll registration to next year for $30.Â
