Ironman 70.3 Boulder

JUN

12

2027

IRONMAN 70.3 Boulder on June 12, 2027 features a reservoir swim, hilly bike and run at higher elevation near the Flatirons.

Sat 12 Jun 2027

Boulder, Colorado

Website

Middle distance 1.9 90 21.1 km

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IRONMAN 70.3 Boulder - Boulder, CO

IRONMAN 70.3 Boulder is scheduled for June 12, 2027 in Boulder, Colorado, and is organized by IRONMAN. The event is listed as accessible for free. It is also noted as a 2027 IRONMAN 70.3 World Championship qualifier.

The course combines open-water and on-road sections. The swim takes place at Boulder Reservoir with an average water temperature reported as 62 °F / 17 °C. The bike course is described as hilly and scenic, set against the Flatirons and Rocky Mountain backdrop, with rolling terrain and higher elevation. The run follows Boulder trails and roads and is also described as hilly. Typical air temperatures for the event window are listed with a high of 91 °F / 33 °C and a low of 55 °F / 13 °C.

Event information highlights local features including the Flatirons, Boulder Reservoir, and downtown Pearl Street for post-race activities. The organizer provides an event schedule, athlete guide, training resources and volunteer opportunities. The event page presents the race environment, course elements and local points of interest without specific race start or finish times. Visit the organization's website for the most recent information.

70 mi

Ironman 70.3