Ironman 70.3 Boulder

IRONMAN 70.3 Boulder is a half-distance triathlon held in Boulder, Colorado, known for its stunning natural backdrop at the foot of the Rocky Mountains. The race features a reservoir swim, a scenic and hilly mountain bike course, and a challenging run through Boulder's picturesque trails and roads. With mild temperatures averaging around 61-79°F (16-26°C) and an average water temperature of 71°F (22°C), the event offers a vibrant outdoor experience.

Boulder’s iconic Flatirons and the lively Pearl Street post-race atmosphere add to the appeal, making it a favorite destination for endurance athletes seeking both competition and Colorado’s outdoor lifestyle. Visit the organization's website for the most recent information.