Colorado 13er (Half Marathon/10k/5k)

11/1/2020 Louisville, CO 80027 US Directions RaceJoy Ready
13.1 Miles of Million Dollar Views!
Collectors Ringer Tee!
Cake at the Finish line!
13.1 Finisher Medal!
Countdown to Race Day


$65 8:00AM MST Price increases after October 9, 2020 at 11:59pm MDT


$45 8:10AM MST Price increases after October 9, 2020 at 11:59pm MDT


$35 8:10AM MST Price increases after October 9, 2020 at 11:59pm MDT

13er VIRTUAL event

$65 Price increases after October 9, 2020 at 11:59pm MDT

10k VIRTUAL event

$45 Price increases after October 9, 2020 at 11:59pm MDT

5k VIRTUAL event

$35 Price increases after October 9, 2020 at 11:59pm MDT
COVID-19 Updates

New Date: 11/1/2020

As of 4-28-20, due to COVID-19, our annual Colorado 13er event will be POSTPONED to November 1, 2020. This is our best option to keep the race going this year with certainty.

You have a few opportunities to participate, see below. Please click the option that is best for you! If you have any questions on what a virtual race may entail, see our virtual FAQ page.

Questions are always encouraged at

We know that you all love this iconic event and its unique course with spectacular views and can't wait to race with you in November! 

Whitney, Race Director 

Here Are Your Options:

We will transfer your registration to the new event date or November 1, 2020 and look forward to having you join us! 

Become a VIRTUAL racer by selecting this option. Event swag (if applicable) will be mailed to registered participants the week of the event date (11/1/20)  Swag isn't scheduled to arrive at our location until a few days prior to the event, so it's possible it may arrive to you by post AFTER the event day.

Virtual runners are encouraged to post their run times and pictures of your race on our Facebook page so that we can all celebrate your accomplishment.  Virtual runners will NOT be able o submit their time since there will be a local event happening. For more info on virtual racing, see our Virtual FAQ page.

Virtual racers can run anytime! You may choose to run on/near the normal date or closer to the new event date! It's up to you!

If you cannot make the postponement date or don't want to be a virtual runner, you have until the scheduled start time of the event to TRANSFER your registration to another 3W Races event (See this link on how to do that.) OR you can defer to the regular Colorado 13er date in 2021 (the first Sunday in June). If you would like to defer, select this option and email us at

If you don't know which event you want to transfer to yet, then simply request a voucher for an upcoming race - we'll email you a voucher code for the amount you paid to be used any time in through 2022.

If you paid with a voucher, contact us by email to reinstate your original voucher value.

All of our races can be found here:


Join us in the 9th year of this exceptionally scenic, looped 13.1 course which runs through gorgeous  Louisville, Colorado!

A half marathon is no joke! We designed this course so that you can enjoy all of the spectacular views of the Flatirons that Colorado has to offer. Come see for yourself. 

Both MEN and WOMEN are invited to this event!

1200 Dillon Road
(Home Depot)
Louisville, CO US 80027
Race Website

Additional race information can be found at


Available for Apple and Android devices.

Interactive Race Day Experience with RaceJoy

Live Phone Tracking, GPS Progress Alerts and Cheers!

We are providing you with RaceJoy as part of the official race experience for the Colorado 13er (Half Marathon/10k/5k).

Download the RaceJoy mobile app in advance to ensure proper phone setup. Invite your friends and family to track you and send you cheers!

Some key RaceJoy features include:

GPS Progress Alerts

  • Receive continual progress updates as you complete your goal.

Live GPS Tracking

  • Remote spectators can track your progress live in a map view. You can also track others.


  • Receive supportive audio cheers from remote friends & family.

Virtual Results (virtual events only)

  • Enter your race-assigned bib number to automatically submit your finish data for real-time scored results.
To use RaceJoy, you must carry your phone and activate tracking on the day you complete your race.
View RaceJoy How-To
Race Contact Info
If you have any questions about this race, please contact the race director at
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