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IRONMAN 70.3 Boulder

August 6, 2022

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.

2022 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 2022 Event Information

2022 race information is to be announced. Typically, the race starts at the Boulder Reservoir with a single-loop swim. Once finished in the water, the first transition will start the athletes on a beautiful one-loop bike course all contained in Boulder County, with 2,000 feet of elevation gain. The two-loop run course tends to be very fast with minimal elevation gain. In past years, most of the course is on dirt roads.

Course Map

View the IRONMAN website for interactive course maps

Ironman Support for Wildfire Recovery

The IRONMAN Foundation launched a Humanitarian Relief Campaign to provide support to those affected by the Marhsall Fire that happened in east Boulder County in December 2021. The IRONMAN Foundation made an initial gift of $10,000 to the Boulder County community to assist with Marshall Fire Relief efforts. For full details on the IRONMAN Foundation’s Marshall Fire Relief Effort, and how to donate, purchase t-shirts, or volunteer, go to the foundation's website.