Convention & Visitors Bureau
2440 Pearl Street, Boulder, CO 80302 | 303.442.2911
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?