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Become a Triathlete

What is Triathlon for Youth and Juniors?

New to the sport?

What is triathlon for youth and juniors?

  • Swim - Triathlon always starts with a swim. The swim can be any stroke apart from backstroke.
  • Bike - The next step is to get on your bike. Any type of bike will do - just check it is roadworthy.
  • Run - Finally, it is time for a bit of running!

There are also other multi-sport events and combinations for you to try. The two most common are aquathlons, which is a swim followed by a run and duathlon which is run-bike-run.


Triathlon really is a sport for all ages. Athletes can begin their journey at the age of 8 in the TriStar Start category and continue competing until they are over 80 years old, if they wish! 

Code Category Age
A Youths 15-16
B Juniors B 17-18
C Juniors C 19

Junior and Youth race distances and age requirements

Triathlon Swim Bike Run Minimum Age
Team Relay 250m 5km 1.5km 15
Super Sprint Distance 250m 10km 2.5km 15
Sprint Distance (Pool Based) 400m 20km 5km 15
Sprint Distance (Open Water) 750m 20km 5km 15
Standard Distance 1500m 40km 10km 17
Middle Distance 3000m 80km 20km 19
Long Distance 4000m 120km 30km 19
Duathlon Run Bike Run Minimum Age
Team Relay 2km 8km 1km 15
Sprint Distance 5km 20km 2.5km 15
Standard Distance 10km 40km 5km 17
Long Distance 20km 80km 10km 19
Aquathlon Run Swim Run Minimum Age
Sprint Distance 1.25km 500m 1.25km 15
Standard Distance 2.5km 1km 2.5km 17
Long Distance 5km 2km 5km 19
Cross Triathlon Swim Mountain Bike Cross Country Run Minimum Age
Team Relay 200m 4km-5km 1.2km-1.6km 15
Sprint Distance 500m 10km-12km 3km-4km 15
Standard Distance 1000m 20km-25km 6km-8km 17
Cross Duathlon Cross Country Run Mountain Bike Cross Country Run Minimum Age
Team Relay 1.2km-1.6km 4km-5km 600m-800m 15
Sprint Distance 3km-4km 10km-12km 1.5km-2km 15
Standard Distance 6km-8km 20km-25km 3km-4km 17

Join a club

If you need help with training or coaching, you might want to contact your local triathlon club to find out more and get involved. Joining a club is great way to meet new friends and progress your training in a safe environment. You can search for British Triathlon affiliated clubs here.

Contact your region

If you have questions about youth and junior activities in your local area, contact your region or Home Nation.

Take part in events

There are youth and junior triathlon events taking place right across the country. Whatever your fitness level, we are sure to have an event to suit you. Find out what is available and enter an event here.

Skills School

Triathlon England, Triathlon Scotland and Welsh Triathlon offer Skills School, a programme designed to develop young triathletes within a fun and creative environment. Skills School is open to all and you can attend Skills School sessions for a chance to learn new skills, have fun and meet other athletes.

Regular Participants

If you are participating regularly, you might already be involved in your local club. There are also other opportunities.

Talent Pathway

The national Talent Pathway helps prepare promising triathletes for success at the highest levels, providing a gateway onto the British Triathlon Performance Pathway.

Triathlon England, Triathlon Scotland and Welsh Triathlon offer Talent Academies. The academies are led by a Head Coach who works with national staff to deliver a programme of support to the best youth and junior triathletes in their region. There are specific selection criteria to be selected for the academies. Find out more here.

Triathlon England, Triathlon Scotland and Welsh Triathlon offer Skills School. Skills School is open for all and create an additional pathway step and improve the link between Triathlon Clubs and the Talent Pathway. Skills School is all about learning new skills, having fun and meeting other athletes and is open to all. Find out more here.

Compete against the best: Youth and Junior Super Series & Age-Group Competition

The British Triathlon Youth & Junior Super Series is designed to bring together the best young triathletes from across the UK, so they can race head to head at the best and most exciting venues in the country. Find out more here.

British Triathlon members are offered a unique opportunity to compete at International Level with the Great Britain Age-Group Team. If you qualify for the team, you can be proud to represent Great Britain and enjoy the experience of racing at an International Triathlon Union (ITU) World Championship or European Triathlon Union (ETU) European Championship. Age-Group Competition starts from age 16 for sprint distance events and age 18 for standard distance and long distance. Find out more here

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