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 European Championships Madrid Age-Group Roll of Honour 5th June 2023 GB Age-Group Team out in force in Madrid 2nd June 2023 A wedding anniversary made sweeter by joint Age-Group golds for Lindsy and Owen James 31st May 2023 Riixo announced as Official Recovery Cuff Supplier 10th May 2023 2023 World Triathlon Multisport Championships Ibiza Roll of Honour 9th May 2023 Making his mark at 82 3rd May 2023 Sustainability in swim, bike, run 21st April 2023