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 Age-Group Competition and Comradeship 18th April 2024 Aberdeenshire, Edinburgh, Cornwall, Venice, Age-Group Gold 5th April 2024 April and May Events Update 4th April 2024 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