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IRONMAN 70.3 Boulder

June 8, 2024

IRONMAN 70.3 Boulder is more than just a "half" IRONMAN. It's a cherished experience at the foot of the Rockies in one of America's hubs for elite athletes.

Nestled at the foot of the stunning Flatirons, Boulder, Colorado, is already a wildly popular home-base and vacation destination for world-class triathletes. The city's health-conscious culture, near-perfect weather and breathtaking natural environment make it a favorite on the IRONMAN circuit. 

The 70.3 offers athletes the chance to focus on their performance and prep for future full IRONMAN opportunities.

2024 Hotel Reservations

Stay in Boulder and maximize your pre- and post-race time, and arrive to the start line fresher. View the IRONMAN 70.3 Boulder hotel options here.

IRONMAN 70.3 Boulder 2024 Event Information

The 2024 race starts at the Boulder Reservoir with a single-loop swim. The bike course is still to be announced (check back soon!). Lastly, the two-loop, 13.1-mile running course will take athletes along the Boulder Reservoir, mostly on hard, compact dirt roads. Spectators will have multiple opportunities to cheer on the athletes for a triumphant finish.

For more information, visit the official IRONMAN 70.3 Boulder website.

For details on the IRONMAN Foundation’s Humanitarian Relief efforts, and how to donate, purchase t-shirts, or volunteer, go to the foundation's website.