The Philippines Ironman 70.3 run course is far and away the toughest, with an average 13.1 mile split of 2 hours, 40 minutes, followed by Florida at 2:27. The next two toughest run courses, Cancun and Eagleman, are tied at 2:23. China and Racine, round out the top 5 toughest run courses.
Brazil and Austria's run courses are remarkably faster than any of the others, and Mooseman also stands out as a fast course. One might wonder about how tightly the courses are measured. An average half marathon of 1:47? Just 2+ minutes slower than the world-class triathletes in Clearwater?