|Sprint||16 miles (25.75km)||.5 miles (.75km)||12.4 miles (20km)||3.1 miles (5km)|
|Olympic Standard||31.93 miles (51.5km)||.93 mile (1.5km)||24.8 miles (40km)||6.2 miles (10km)|
|Half Ironman||70.3 miles (112.997km)||1.2 miles (1.9km)||56 miles (90km)||13.1 miles (21.09km)|
|Full Ironman||140.6 miles (225.995km)||2.4 miles (3.8km)||112 miles (180km)||26.2 miles (42.195km)|
The length of each part of a triathlon depends on what type of triathlon an athlete is competing in. In each official distance though, the swim is the shortest, the bike is the longest, and the run is at a distance between those two. The order of each triathlon is also the same in each official distance, always beginning with the swim, followed by the bike section and then the run.