• Top 10 in America USA Today 2024, 2025, 2026
  • #2 Fastest Growing Race in US - RunSignUp
  • Best Fall Marathons - Runners Wolrd
  • Top 10 in America USA Today
  • #2 Fastest Growing Race in US - RunSignUp
  • Best Fall Marathons - Runners Wolrd
  • Top 10 in America USA Today
  • #2 Fastest Growing Race in US - RunSignUp
  • Best Fall Marathons - Runners Wolrd
  • Top 10 in America USA Today
  • #2 Fastest Growing Race in US - RunSignUp
  • Best Fall Marathons - Runners Wolrd
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SUSTAINABILITY

AT BOULDERTHON

REDEFINING RACE DAY SUBSTAINABILITY

Materials

100% Recycled Finisher Medals

Every participant earns a medal made from recycled materials – designed to celebrate achievement without unnecessary waste.

Innovation

100% Hemp Bibs

First race to introduce fully hemp-based bibs for the 5K – a durable, lower-impact alternative to traditional synthetic materials

Systems

Purpose-Built Waste Reduction

Custom-designed systems that reduce waste, materials, and emissions across the entire event – from start line to finish chute.

ELIMINATING 90,000 DISPOSABLE CUPS

Return rate
0 %
CUPS LOST
0
DISPOSABLE CUPS ELIMINATED
0 K+

In partnership with the City of Boulder, Boulderthon implemented a large-scale reusable cup program on course with Hiccup – setting a new benchmark for sustainable hydration at major running events.

WHAT SUSTAINABILITY
LOOKS LIKE MEASURED

Sustainability at Boulderthon is defined by outcomes, not intentions. Every initiative is designed to deliver measurable environmental results, from reducing waste and emissions to conserving water at scale.

Landfill waste avoided

-Average disposable cup weight: ~4.5 grams
- Approximately 893 pounds of landfill waste avoided
- Equivalent to: 893 runners each dropping a one-pound bag of trash on course

THE VIEWS

Average footprint per wax-lined paper cup: 0.11 kg CO₂e
9.9 metric tons of CO₂e avoided
That’s equivalent to:
24,500 vehicle miles not driven 1,000 runners skipping a 25-mile round-trip drive to the race
Lululemon for all
-Average water use per paper cup:0.8 liters
-Approximately 19,020 gallons of water saved
That’s equivalent to:
The monthly household water use of 380 people 1,250 post-race showers