Registration for Boulderthon 2023 is now open! After nearly tripling in size and selling out last year, Boulderthon has instituted a new 5,000 runner cap and is expected to sell out again this year. Register today.
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GET INVOLVED

Sign up to volunteer today!

Every great marathon has an incredible team of volunteers behind the scenes making it all happen!

Volunteers will receive:

  1. Official Boulderthon Long-Sleeve Volunteer Shirt
  2. 50% discount off the next Boulderthon
  3. Opportunity for Branding an Aid Station *for groups 15 or larger
  4. Goodie Bag
  5. Community service hours (if applicable)
  6. Opportunity to provide critical support and cheer on runners!
VOLUNTEER FOR 2022

Our Volunteer Coordinator will be in touch via email with your shift time and details.

BOULDERTHON®
A STRONGER FASTER BOULDER CO. PRODUCTION

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© 2023 Stronger Faster Boulder Co.

Boulderthon is a Boston Marathon Qualifying (BQ), USATF Sanctioned Event, measured by a Level A USATF Course Measurer, representing the highest level of certification for a marathon race series.

Based in Boulder, Colorado, Stronger Faster Boulder Co. is a Colorado non-profit organization and federally-recognized as a 501(c)(3) tax-exempt foundation, EIN # 84-2863972. Donations and contributions are tax-deductible as allowed by law.