2019 Official Results Are In

You were snow incredible.

Join The ColderBOLDER On December 5, 2020

The first race kicks off at 7:45am. Learn more about start times.

Race, Run, Jog, or Walk

We want you to have the time of your life no matter how fast you are, even while freezing your buns off!

The Course

Wind through the scenic University of Colorado campus, the course finishes inside the toasty Balch Field House.

CB Expo

After you finish, check out the expo for great food and drink samples, and tons of other schwag.

Finish Line Party

The perfect way to end your 5K is running into the Balch Field House to celebrate with friends and family. Watch the Cold Medal Ceremony while you enjoy your free goodies.

The ColderBOLDER

This 5K is a little different, but so are those of us who enjoy running in the cold. It is actually 14 individual races. The top three men and women in each race win Cold Medals. That’s 84 medalists total. 

The First 13 Races

These are for people who participated in the last BOLDERBoulder. Each individual race puts people together who are about the same speed. Why? So everyone has a shot at winning. For example, if you finished the BOLDERBoulder in 52 minutes you would race against people who finished between 52-54 minutes. It’s your chance at personal glory and eternal fame. You got this. 

The 14th and Final Race 

This is open to everyone, runners, joggers and walkers. We all want to stay fit over the holidays, and we want everyone to be able to participate. So, break out in a cold sweat with us. Let’s pour cold water on those winter blues. 

We’ve Got Your Back

We know how you like to be treated.

No hidden fees!

That’s right.

We know how you like to be treated. That’s why we are committed to complete TranspaRUNcy around our events.

Learn more.

Can’t make it?

No problem!

If you sign up and can’t participate, you can roll your registration to next year’s ColderBOLDER for only $20.  Learn more.

2020 ColderBOLDER Race Package

2020 ColderBOLDER registration will open in the Fall of 2020. Artwork coming soon.

ColderBOLDER 2019 Video


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Start Winter on the Right Foot.

ColderBOLDER 2020 Countdown. Dec. 5, 2020.








We Couldn’t Do It Without Our Partners

Oskar Blues

Official Brewery and Anti-official Recovery Drink of the ColderBOLDER.




Our Official Bank has been keeping Coloradan’s financially fit since 1963.

Boulder Running Company

Gear up for the cold with our Official Running Company Sponsor.