Take Part in Colorado’s Premier Fall Event!
Boulder, Colorado has consistently made the CDP’s “Cities A List” for its efforts in building an Earth-positive future. Boulderthon contributes to that designation through its sustainability initiatives, making it a fitting event to participate in while raising funds to protect the planet!
Racing for Sustainability provides guidance and grants for greener races. Whether you run the Half Marathon or the Marathon as a member of Team RFS, you’ll be helping racing events implement eco-conscious practices: reducing waste, conserving resources, and fostering a culture of environmental responsibility within the running community.
Choose Your Distance!
Both races will take place on Sunday, September 27, 2026.
What you can expect as a member of Team Racing for Sustainability:
- An exclusive code to register for FREE
- Personal online fundraising page
- Guides to help you achieve your fundraising goal with confidence
- Racing for Sustainability Lululemon singlet
- A training plan created by Coach Steve Picucci and World Championship runner Tina Muir
- Virtual meetups and group chats with your fellow team members
Our fundraising minimums are:
- Half Marathon: $750
- Marathon: $800
If you’d like to run with Team Racing for Sustainability, click below to get started!