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HOW to train for a triathlon
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Triathlon Distances Explained: Sprint, Olympic, 70.3 and IRONMAN

Jennifer Ward

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Last updated:

February 18, 2025

Triathlons are one of the most exciting and rewarding athletic challenges on offer, with their unique combination of swimming, cycling, and running in a single event. Whether you're new to the sport or looking to move from a shorter triathlon to a longer one, understanding the many different triathlon distances is key to choosing the right event for your fitness level and setting meaningful goals. From uber-short super sprints to the iconic Ironman triathlon and even off-road events, the variety of formats out there means that there's a challenge for everyone!

As experienced amateur triathletes ourselves, we know the world of triathlon can be overwhelming. Understanding how long each format is, as well as how much time it takes to train and complete each race, is key to success. That's why we put together this guide; we've got your back with clear breakdowns of every major triathlon distance.

What You'll Learn in This Article

  • Detailed breakdowns of each triathlon distance
  • Swim, bike, and run segments of the main triathlon formats
  • Insights into race formats and well-known triathlon race series
  • Tips for training each discipline of a triathlon
  • Answers to common questions

Understanding Different Triathlon Distances

The phrase "triathlon distance" refers to the overall sum of the parts, not each individual leg or portion. The individual distances of the swim, bike, and run in each contribute to the designation of that event as a sprint or Ironman, for example, but the triathlon event as a whole is given a name, or "distance," as a single entity.

What is a Super Sprint Triathlon?

The super sprint triathlon is the shortest format, ideal for beginners or those looking for a quick and fun race. It offers an entry-level challenge without overwhelming distances.

  • The swim in a super sprint triathlon is 400 meters/437 yards/0.4 kilometers/0.25 miles. The average swim time for this distance is 8-10 minutes.
  • The bike in a super sprint triathlon is 10 kilometers/6.2 miles. The average bike time for this distance is 25-30 minutes.
  • The run in a super sprint triathlon is 2.5 kilometers/1.55 miles. The average run time for this distance is 10-15 minutes.

Super sprints are often held in a swimming pool, making them less intimidating for those worried about swimming in open water.

Sprint Triathlon Distances Explained

The sprint triathlon is the next step up and one of the most popular triathlon distances. It's great for beginners and experienced athletes alike because it combines manageable distances with the opportunity to go fast, and push your competitive edge.

  • The swim in a sprint triathlon is 750 meters/820 yards/0.75 kilometers/ 0.466 miles. The average swim time for this distance is 18-20 minutes.
  • The bike leg is 20 kilometers/12.4 miles. The average bike time for this distance is 45-1 hour and 15 minutes.
  • The run portion is 5 kilometers/3.1 miles. The average run time for this distance is 28-35 minutes.

Sprint triathlon distances are perfect for those who want to challenge themselves without committing to longer formats.

Olympic Distance Triathlons Explained

The Olympic distance triathlon, also called the standard or International distance triathlon, made its debut at the Olympic Games in 2000. This is the most common format in events such as the World Triathlon Championship Series.

  • The swim in an Olympic distance triathlon is 1.5 kilometers/1,500 meters/0.93 miles. The average swim time for this distance is 30-40 minutes.
  • The bike leg is 40 kilometers/24.8 miles. The average bike time for this distance is from 1 hour and 20 minutes up to around 2 hours.
  • The run portion is 10 kilometers/6.2 miles. The average run time for this distance is 45 minutes to 1 hour and 10 minutes.

If you’re ready to step up from shorter races, Olympic distance triathlons offer a more serious endurance challenge but with the chance to work on speed.

Getting to Know the Half-Distance (Ironman 70.3)

The half-distance, also known as half Ironman or Ironman 70.3, is a middle-distance triathlon perfect for athletes looking for a longer challenge without the training and racing demands of the full Ironman.

  • The swim in an Ironman 70.3 is 1.9 kilometers/1,900 meters/1.2 miles. The average swim time for this distance is 35-45 minutes.
  • The bike leg is 90 kilometers/56 miles. The average bike time for this distance is between 2 and 3 hours.
  • The run portion is 21.1 kilometers or 13.1 miles (a half marathon). The average run time for this distance is 1 hour and 45 minutes to 2 and a half hours.

The total distance covered in an Ironman 70.3 is 70.3 miles, making it a significant but achievable endurance challenge. Many athletes choose to complete a half-distance triathlon before taking on a full. The IRONMAN 70.3 World Championship, held in different locations every year, is the pinnacle event for triathletes at this distance.

Conquering a Full-Distance Triathlon (Ironman)

The full-distance triathlon, colloquially known as the Ironman, is the ultimate test of endurance. This race covers 140.6 miles and takes upwards of 10 hours for most amateur triathletes, pushing athletes to their limits, physically and mentally. Ironman is a lifelong goal for many triathletes. (Any race longer than a full-distance triathlon is referred to as an ultra distance triathlon.)

  • The swim in a full Ironman triathlon is 3.8 kilometers/3,800 meters/2.4 miles. The average swim time for this distance is between 1 and 2 hours.
  • The bike leg is 180 kilometers/112 miles. The average swim time for this distance is between ****5 and 7 hours.
  • The run portion is 42.2 kilometers/26.2 miles (a full marathon). The average run time for this distance is between 3 and a half to 5 hours.

Completing the full distance requires months of dedicated training, including mastering long bike rides, swimming in open water, and running a marathon after hours of effort. The Ironman World Championship in Kona, Hawaii, is the pinnacle event for professional triathletes and age group athletes alike.

Check out our average triathlon finish times calculator for yourself below:

How Does a Triathlon Work?

Now that we've got a handle on our distances, let's take a look at how a triathlon actually unfolds. The structure of every triathlon follows the same sequence:

  1. Swim: The race starts with swimming, either in a swimming pool or open water. Starting all together in a mass start is no longer the most common way for athletes to start. Many races now feature separate starts, where athletes are grouped by gender and age group and enter the water in waves.
  2. Transition 1 ("T1"): Athletes exit the water, run to their bike, and remove their swim clothing to transition to the bike leg.
  3. Bike: Athletes transition to their bike, which makes up the second leg of the race.
  4. Transition 2 ("T2"): Athletes dismount their bike, rack it, and change into run clothing and shoes for the run leg.
  5. Run: The final leg is running, culminating in the finish line.

Transition times between legs can impact overall performance, so practicing smooth transitions in training is key.

What Are Different Triathlon Race Formats?

Though they usually follow the above order (except in the case of some Supertri triathlons, as we cover below), there are some differences between formats to keep the sport of triathlon diverse and engaging:

  • Draft-legal races: Athletes can draft, or ride behind other cyclists (common in Olympic triathlons).
  • Non-drafting races: Drafting is not allowed, as seen in Ironman triathlon events.
  • Relay events: Teams divide the swim, bike, and run among members.
  • Supertri triathlon: Shorter distances with dynamic race formats.
  • Xtreme Triathlon: Off-road and challenging courses.

The Excitement of Supertri Triathlons

The style of triathlon offered by the company Supertri is fast-paced and exciting, with shorter distances and unique challenges like multiple race rounds, quick transitions, and intense, spectator-friendly events.

Supertri events attract professional triathletes and bring a unique energy to the triathlon scene.

Joining the Triathlon World: Your First Triathlon

Choosing, training for, and preparing for your first triathlon can feel overwhelming, but it’s completely achievable with the right approach. Be strategic about your racing, and work your way up so that you're not overwhelmed by the longer distances. Here are some tips to keep in mind:

  • Start with a super sprint or sprint triathlon distance.
  • Choose a race close to home to reduce logistics stress.
  • Focus on basic triathlon training for all three disciplines.
  • Practice swimming in open water and smooth transition times.

Remember, every triathlete started somewhere, and completing your first event is an incredible achievement.

How Long Does It Take to Train for a Triathlon?

The exact time commitment for triathlon training depends again on your race distance and personal goals. Here are some common race distances and associated weekly training hours and timelines:

Sprint Triathlon (750m swim, 20km bike, 5km run):

  • Finish with no endurance background: 3-4 hours/week for 3 months.
  • Finish with an elite sports background: 3-4 hours/week for 3 months.
  • Compete with no endurance background: 5-6 hours/week for up to 2 years.
  • Compete with an elite background: 5-6 hours/week for 3 months.

Olympic Triathlon (1.5km swim, 40km bike, 10km run):

  • Finish (with no endurance background): 4-5 hours/week for 6 months.
  • Finish (with an elite sports background): 4-5 hours/week for 3 months.
  • Compete (with no endurance background): 6-7.5 hours/week for up to 2 years.
  • Compete (with an elite/experienced background): 6-7.5 hours/week for 6 months.

Half-Ironman (70.3: 1.9km swim, 90km bike, 21.1km run):

  • Finish (with no endurance background): 5-6 hours/week for 9 months.
  • Finish (with an elite sports background): 5-6 hours/week for 3 months.
  • Compete (with no endurance background): 8-9 hours/week for up to 4 years.
  • Compete (with an elite/experienced background): 8-9 hours/week for 6 months.

Full Ironman (3.8km swim, 180km bike, 42.2km run):

  • Finish (with no endurance background): 7.5-9 hours/week for 12 months.
  • Finish (with an elite sports background): 7-8.5 hours/week for 4 months.
  • Compete (with no endurance background): 11-12 hours/week for up to 4 years.
  • Compete (with an elite/experienced background): 11-12 hours/week for 18 months.

Pro Tip: If you’re just starting, consider doing one triathlon distance per year as you build experience and fitness. This gradual approach reduces the risk of injury and builds a strong base.

You can use this calculator to get a sense of how long you'll need to train for the distance of triathlon you'd like to do, based on your current fitness level:

If you’re looking to set big personal goals, check out our app with unlimited options for triathlon distances and training. Every single plan is personalized for you, your fitness level, your goals, and your schedule. We can get you ready to take on that big challenge. With MOTTIV, you’re ready for race day!

Training for Each Discipline in a Triathlon

Once you've decided on the triathlon distance you'd like to target, the fun part begins: training. The distance you choose to race will dictate the type of training you do, as well as the duration and frequency of sessions.

Swim Training for Triathlon

With the right gear and just a few hours per week in the pool, you can become a confident swimmer, ready to take on your first race. Here are some of our favorite tips for success:

  • Break swim training into shorter intervals to work on both swim endurance and speed.
  • Practice in both swimming pools and open water, to simuate race-day conditions like sighting.

Building Strength on the Bike

Cycling requires both endurance (the ability to cycle longer distances), and strength.

  • Focus on sustained, longer efforts, such as 5-8 minute intervals.
  • Practice your nutrition and pacing for long-course triathlon events.

Preparing for the Run

Run training for triathlon should focus on endurance, speed, and form/efficiency. As you begin your run training, keep these tips in mind:

  • Incorporate brick workouts (bike and run back-to-back).
  • Gradually build mileage to match your race distance.

FAQ: Common Questions About Triathlon Distances

Q: What is the most popular triathlon distance?

A: The sprint triathlon distance is the most popular because it is beginner-friendly, manageable, and widely accessible.

Q: What are the main triathlon distances available for athletes?

A: The main triathlon distances include super sprint, sprint, Olympic, standard, middle distance (also known as half ironman), long course, and ironman distance events. Each distance offers a unique challenge for participants.

Q: What is the difference between a sprint distance and an Olympic distance triathlon?

A: A sprint distance triathlon typically consists of a 750m swim, 20km bike ride, and a 5km run, while an Olympic distance event includes a 1.5km swim, 40km bike ride, and a 10km run. The Olympic distance is often seen in international competitions, including the Olympics.

Q: What does an Ironman triathlon entail?

A: An Ironman triathlon is a long-distance triathlon that consists of a 2.4-mile (3.86 km) swim, a 112-mile (180.25 km) bike ride, and a 26.2-mile (42.20 km) run. This challenging event tests the endurance of athletes and is often referred to as the full distance.

Q: What is the Ironman World Championship?

A: The Ironman World Championship is a prestigious event held in Kailua-Kona, Hawaii, and Nice, France, that brings together the best athletes from around the globe to compete in the full distance. It showcases top-tier competition and is a highlight on the triathlon calendar for many athletes.

Q: What is the Ironman 70.3 World Championship?

A: The Ironman 70.3 World Championship is a prestigious event that brings together the best athletes from around the globe to compete in the half-Ironman distance. It showcases top-tier competition and is a highlight on the triathlon calendar for many athletes.

Q: What are long-distance triathlons, and how do they differ from other formats?

A: Long-distance triathlons generally refer to races longer than the standard Olympic distance, such as half and full Ironman events. They require extensive training and endurance, appealing to seasoned triathletes looking for a challenge beyond short course events.

Conclusion

No matter what distance you choose, the training journey and experience of crossing a triathlon finish line is incredibly rewarding. Now that you've got a handle on the various formats out there, it's time to set your goal and begin training!

If you’re ready to get started, download the MOTTIV training app for a free, personalized training plan that does all of the planning for you. We want to make sure you’re properly trained and confident to tackle your first race.

Get a free triathlon training plan

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Jennifer Ward

| Author

Jennifer Ward is a journalist and writer who served in editorial roles at both LAVA magazine and IRONMAN. She has lived in Winnipeg, Vancouver, Syracuse NY, Washington DC, and San Diego, Calif., where she truly fell in love with triathlon. In her racing prime, Jen completed 8 full-distance Ironman races and too many shorter races to count, usually landing herself in the top 10 in her age-group.

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