Ironman 70.3 Boulder

IRONMAN 70.3 Boulder

IRONMAN 70.3 Boulder is scheduled for June 13, 2026, in Boulder, Colorado, United States. The course combines open-water and land segments: a swim in a reservoir, a mountain bike section described as hilly, and a run that follows Boulder’s trails and roads and is also described as hilly. The route is set against the Flatirons and the Rocky Mountains and includes rolling terrain at higher elevation.

Published event conditions list typical temperatures for the event area, including an average water temperature of 71 °F / 22 °C, a high air temperature near 79 °F / 26 °C, and a low air temperature near 61 °F / 16 °C. The event carries an IRONMAN 70.3 World Championship qualifying designation. The location is identified as Boulder Reservoir and downtown Boulder, including the Pearl Street area, referenced as part of the local experience for athletes and support crews.

The event page notes local community involvement and family-friendly activities around the race weekend. Event organization is by IRONMAN and the event listing indicates public accessibility is free. Practical details such as the athlete guide and event schedule are provided separately by the organizer. Visit the organization's website for the most recent information.

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