The Ironman triathlon is the ultimate test for any sportsman that consists of a 2.4 mile swim, 112 mile cycle and then you have a marathon of 26 miles.
The iron man triathlon involves 3 sports, Swimming 2.4 miles, biking 112 miles and running a 26 mile marathon. Any athlete that can do this has to be very strong and have great endurance which is why they have the name iron man
It involves a long swimming event, usually followed by a lengthy (40 + miles) bike race, finishing with a full length marathron. Not for the weak of body
