In addition, Katie Ledecky of the United States holds the women's mile swim world record of 15 minutes and 20 seconds. However, these times are from "the competitive swimming mile," which is really 110 yards short of a mile, although it is still extremely close. Iron Distance Triathlon: The swim distance is 2.4 miles (4000 yards). Conversions for miles, yards, and lengths are shown below. You can also check out our swim workouts by clicking here.