IRONMAN 70.3 Boulder

IRONMAN 70.3 Boulder course: how fast are the swim, bike and run?

IRONMAN 70.3 Boulder: 1.3% slower than the median course (bike 1.4% faster, run 7.4% slower, swim 3.8% slower). The same athletes' times compared across every course, and a time predictor.

Next race 12 June 2027 in Boulder, Colorado, USA; 60 World Championship slots; a course 1.3% slower than the median one; 1,450 finishers in 2026.

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• Slots and qualifying times
• How 2026 played
• 2026 results
• Who races
• Course speed
• Over the years
• Every race