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This is the 17th running of the Boulder Backroads Marathon. This year's race includes a Marathon, Half Marathon, and 10k. The marathon will be a double loop of the half marathon course to make it more runner- and spectator-friendly. More information is available at

Registration fees

Marathon Closed

Half Marathon Closed

10k Closed


The Start

After party and race day expo

Finishers Medals

Backroads Marathon and Half Marathon

Boulder Backroads 10k course

Event Schedule

  • September 29 4:00 PM MDT - Last day to preregister on Raceroster

  • September 30 12:00 PM MDT - Early packet pick up at Avery Brewery

  • October 1 5:45 AM MDT - Packet Pickup and race day registration

  • October 1 7:15 AM MDT - Race Start - Marathon and Half Marathon

  • October 1 7:40 AM MDT - 10k Race Start

Contact Information

Event Location

Boulder Reservoir, Boulder, CO, United States

Click here to view map