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    IRONMAN 70.3 Boulder

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    Overview


    Hosted by a town many pro triathletes call home base throughout the year, IRONMAN 70.3 Boulder showcases a beautiful course and location.


    IRONMAN 70.3 Boulder kicks off at the pristine Boulder Reservoir with its spectacular Rocky Mountain backdrop. 


    This event has been an athlete favorite for over a decade. IRONMAN 70.3 Boulder is one of the fastest IRONMAN events to sell out each year—making it one of the most sought-after races in the country.


    The extremely fast course provides personal records for many, even our local professional field. 


    Participants begin their journey with a 1.2-mile swim in the Boulder Reservoir, followed by a fast and flowing 56-mile bike course through North Boulder County. The two-loop, 13.1-mile run course begins and ends at the Boulder Reservoir.


    Where else in the country can you race against the best in the world on their home training ground?

    IRONMAN 70.3 Boulder