Submit an Update or Correction for a Race

Our Current Race Information

  • Race Name
    Boulderthon: Downtown Boulder Marathon
  • Race Date
    Sep 28, 2025 - Sunday
  • Events
    26.2M, 13.1M, 10K, 5K run | kids run
  • City
    Boulder, CO
    City Location
  • Directory Status
    This Race appears in our directories.

Race Information

  • Updates WILL NOT be published Until...

    ...we review them using the link you provide below. If we do not find your Race information using that link, we will not update your Race in our directory.
    Race Name
    The link you provide below must show this date. If we cannot find the date on your web page, we will reject your submittal.

    Multiple Dates?

    If your race occurs on multiple dates, (ex: weekly series), put the first date in the box above, and then either type in the additional dates here, or describe the recurrence. (ex: Every Thurs from May to Aug) Make sure the link you provide below directs us to your race dates.
    Additional Dates:
    City
    State
    Race Events
    • 26.2M run
      13.1M run
      10K run
      5K run
      kids run
    • 1M
      4M
      5M
      last man standing
      track meet
      stair climb
      Other Run Distance(s)
      (Ex: 8.5M, 12K, 4H)
    • 5K
      10K
      13.1M
      26.2M
      50K
      Other Trail Run Distance(s)
      (Ex: 8.5M, 12K, 4H)
    • 13.1M
      26.2M
      Other Relay Distance(s)
      (Ex: 8.5M, 12K, 4H)
    • supersprint
      sprint
      olympic
      half
      ironman
      other
    • supersprint
      sprint
      olympic
      half
      ironman
      other
    • youth triathlon
      indoor triathlon
      aquathon
    • Enter distances for your events using this format: Number followed by K, M, or H (for kilometers, miles, or hours). Use a comma to separate multiple distances. Ex: 5K, 8M, 4H
      Adventure Race Distance(s)
      Mud Run Distance(s)
      Novelty Run Distance(s)
      (color, bubble, inflatble, zombie, etc.)
      Obstacle Run Distance(s)
      Running Tour Distance(s)

    Additional Race Details

    If your race doesn't quite fit into the categories above, or needs explaining...
    Examples: beer run, donut run, eat a burrito while you run, stair climb details, adventure race details, last man standing, reverse triathlon, etc...
    Additional Race Details
    200 character limit

    We Need Proof

    Please provide a website link where we can find and verify the Race information.
    (a link is that thing that starts with http:// or https://)
    Race Website Link

    Need Other Changes?

    If you need to make other changes that are not covered here, please send us an email, and reference the ListingID 91015

    Send Email About This Race

    Website Not Ready Yet?

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    Review my submittal on or after:

    If We Have a Question...

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    Email Address:
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    Please send me a notification next year to update my race.