Boulder Backroads Half Marathon & 10k is now The Boulderthon™
We are excited to announce that our race series will continue its local tradition, and will feature an expanded field and new course for 2020. Run the Inaugural Boulderthon™!
Boulder's First & Only Downtown Marathon & Half Marathon with a Finish on Pearl!
10.11.20 - Columbus Day Weekend
Register by 2/29 to save $10 with PROMO CODE BB10.
Registration fees
Half Marathon Closed
Online registration closed-
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$75.00Nov 15 – May 31
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$90.00Jun 1 – Jul 31
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$100.00Aug 1 – Sep 26
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10k Closed
Online registration closed-
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$35.00
early bird
Nov 15 – May 31 -
$45.00Jun 1 – Jul 31
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$50.00Aug 1 – Sep 26
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Volunteers
The Start
After party and race day expo
Finishers Medals
Backroads Marathon and Half Marathon
Boulder Backroads 10k course
Event schedule
- September 26 11:59 PM MDT - Last day to preregister on Raceroster
- September 27 12:00 PM MDT - Early packet pick up In Motion Running
- September 28 5:45 AM MDT - Packet Pickup and race day registration
- September 28 7:15 AM MDT - Race Start - Half Marathon
- September 28 7:30 AM MDT - 10k Race Start
Contact information
- Event contact
- Henry Guzman
- hjgrun@gmail.com
- Phone
- +1 303-517-7046
- Website
- Visit website
