HomeGet Involved What Is Triathlon? Heard about triathlon but still not really sure what it's all about? Here you can find out all you need to know! Become an Age-Grouper The GB Age-Group competition offers all Home Nation members a unique opportunity to compete up to an International Level. Membership As a member you can access a great range of exclusive related benefits designed with your swim, bike, run experience in mind. NEWS Three-year journey to Age-Group World Champion 21st March 2024 My change in approach to racing 19th March 2024 Family inspiration and team support in Age-Group 6th March 2024 World Triathlon Winter Championships Roll of Honour 27th February 2024 British Championships 2024: Your Official Guide 21st February 2024 Siddall starts 2024 on the podium 19th February 2024 British Triathlon updates safeguarding guidance for clubs and coaches working with children and young people 15th February 2024