Swim Course

(1.2-miles/1 loop)

The one-loop swim takes place in the Boulder Reservoir. The water temperature is generally between 70 and 74 F in August.

Swim Map (PDF)

    About the event

    Athletes will begin with a 1.2-mile, one-loop swim in the Boulder Reservoir followed by a 56-mile relatively flat bike course with slight inclines and descents. The 13.1-mile, two-loop course offers great views of the Rocky Mountains and allows spectators to cheer athletes on as they head to the finish line.

    Ironman Worldwide

    Connect to triathletes at Ironman events