UK Triathlon stage 11 weekends of award-winning events throughout the year that are enjoyed by thousands of competitors. From novice to pro triathlete, ages 5 to 85, and all abilities. UK Triathlon events are professionally organised, whilst remaining fun and friendly for all abilities. We are the organisers of the largest independent national triathlon race series in the UK. These include adult swim-bike-run triathlon and children's triathlon/run-bike-run duathlon nationwide in our 2023 Race Calendar.