How long is the swim in the iron man?

The swim portion of an Ironman triathlon is 2.4 miles (3.86 kilometers) long. This is the first segment of the race, followed by a 112-mile (180.25 kilometers) bike ride and a 26.2-mile (42.20 kilometers) marathon run. Athletes must complete the swim within a specified time limit, typically around 2 hours and 20 minutes.