How long is an Ironman distance triathlon? An Ironman triathlon is composed of a 2.4 mile (or 3.8km swim), a 112 mile (or 180km) bike and a 26.2 mile (or 42.2km) run.
This totals 140.6 miles, or 226km. It’s definitely a long, hard day out!
As with all triathlons, the Ironman distances are completed in the same order of swim, bike and the run (a full marathon!) to finish.
In this article, you’ll learn:
- How each leg of an Ironman distance compares.
- What are the Ironman cut-off times?
- What is a respectable Ironman time?
- Why is the Ironman distance 140.6 miles?
- Why is it called an Ironman?
- Is 140.6 a full Ironman?
- How many hours a week is Ironman training?
- Is there a race longer than an Ironman?
- What percentage of people finish an Ironman?
Comparing Ironman Distances for each Discipline
How does each discipline compare in an Ironman distance? See the chart below:
As you can see, the bike makes up nearly 80% of an Ironman distance triathlon! The swim is less than 2% and the run is the remainder – nearly 19% of the total Ironman distance.
However, the reality is that the run is a marathon which doesn’t start until you’ve completed the 2.4 mile swim and 112 mile bike … so it’s hard!
Here is how the Ironman distances compare with other common triathlon distances – namely the sprint, standard (or Olympic) and half-Ironman (70.3):
What are the Ironman Cut-Off Times?
An Ironman takes a loooong time, even if you’re at the front of the race competing for the podium! For reasons of safety and practicality, Ironman events will impose cut-off times for each discipline. These will vary per event, but are generally:
- Swim Cut-off Time : 2hrs 20mins.
- Bike Cut-Off Time: Up to 10hrs 30mins, the time beginning when the athlete starts the swim and therefore includes the time in the first transition, or T1.
- Run Cut-Off Time: Up to 17 hours, the time also beginning when the athlete starts the swim, so in effect this is the cut-off to complete the event.
If you fail to make any of the event cut-off times you will be asked to exit the course and you will be recorded as a “DNF” standing for “Did Not Finish” in the results 🙁
What is a Respectable Ironman Time?
A common question is what is a respectable Ironman time?
Generally speaking, a good Ironman time is sub 12hrs 30mins for a man and sub 13hrs 30mins for women.
For amateurs, times will vary based on age – older athletes are generally slower than their younger competitors.
To put this into context, the professional male winners usually complete a full Ironman in under 8 hours. The professional women are not far behind in around 8.5 hours.
Obviously these times will vary by course (flat courses are naturally faster than hilly ones) and conditions (strong winds and driving rain will make you slower, especially so on the bike if you’re cycling into a headwind).
But anyone that completes an Ironman within the event cut-off limits has a respectable Ironman time! It is a very gruelling event and will push your limits, so the vast number of competitors are happy to just get round.
Why is the Ironman Distance 140.6 Miles?
Who on earth decided an Ironman distance should be 140.6 miles? It turns out this is an amalgamation of the Waikiki Roughwater Swim (2.4 miles), the Honolulu Marathon (26.2miles) together with a local bike club route that happened to be 112 miles!
The inventors of this event were Judy and John Collins. Having organised a local swim-run event in Honolulu, Hawaii, in 1977, they had the idea of putting on a triathlon event the following year.
The goal was to create something that would challenge endurance athletes and was inspired by the existing Waikiki Roughwater Swim and the Honolulu Marathon events.
The bike leg was devised from a local cycling club route and John remarked that “whoever finishes first will be called the Iron Man”.
And so in the following year, on February 18, 1978, the first-ever Ironman triathlon was raced.
Now it is a global phenomenon, with races on every continent alongside the sister event of the half-Ironman.
Why is it Called an Ironman?
How did this full-distance triathlon get its name as an Ironman?
This was down to John Collins, one of the inventors of the distance. John remarked that “whoever finishes first, will be called the Iron Man”.
Nowadays, anyone that finishes an Ironman will be announced by the finish line speaker as now being an Ironman. It is one of the iconic moments that you can look forward to on completing an Ironman distance event.
Is 140.6 a Full Ironman?
Yes, a 140.6 is another term for a full Ironman distance triathlon.
This is because 140.6 is the total distance (in miles) that you cover in an Ironman distance event.
Because Ironman is actually a brand name, only full distance triathlons organised by Ironman themselves can be called an Ironman event. This is why other full distance events will refer to them as a 140.6, long distance, long course, full distance or some other related name.
How Many Hours a Week is Ironman Training?
For a first-time triathlete attempting the distance, your peak training weeks of volume would be around 12 hours. But you should already be a trained athlete, being able to comfortably swim and run for 45 minutes and cycle for 60 minutes.
Ambitious and experienced athletes may be able to handle a training load that peaks at 18-20 hours per week of training across the three disciplines.
The actual amount of training you need will really depend on what base level of training you are starting from and what your objectives are for the Ironman triathlon itself. Some will just want to finish within the cut-off times. Others will be going for a Ironman World Championship qualifying slot.
One thing is for sure – whatever your goals, attempting an Ironman needs commitment!
Is There a Race Longer than an Ironman?
If you want to go to extremes and feel the Ironman distance is too easy, then you have options!
There are double and even triple Ironman events, which are as you would expect – each leg is double or triple the distance of a standard Ironman distance!
There are also challenges such as completing 10 Ironman distance events in 10 days.
And don’t forget the world of ultra-running, where there are running races up to 100 miles of off-road trails!
What Percentage of People Finish an Ironman?
This will vary based on the difficulty of the course and the conditions on the day. But generally, 80-95% of participants finish in the cut-off time.
Remember, everyone that enters will be taking it seriously and training properly for the event – increasing their chances of finishing it.
Final Thoughts
For many athletes, the Ironman distance event represents the pinnacle of the sport. An endurance challenge that will push you to your limits and needs grit and consistency to just keep going with the training.
Have you completed an Ironman event, or are you planning to? If so, which one do you have in mind? Let us know in the comments!
Sarah
Wednesday 20th of September 2023
Excellent article! My partner is very much into triathlon and this has helped me get a better understanding of just how much discipline and dedication it takes. Looking forward to reading more of your content!