At 47, Mark Allen was in the best shape of his life. He was well on his way to his goal of competing in 50 events before his 50th birthday.
That day, he would hit No. 21. The race – in Augusta, Georgia – was an Ironman 70.3, so named because competitors would swim, bike and run a cumulative 70.3 miles. Also known as a half Ironman, it would be his fourth such race.