- Sat 2 - Sun 3 Aug 2025
- £109-£264
- Sat 2 - Sun 3 Aug 2025
- £109-£264
London T100
Formerly The London Triathlon, this is one of the world’s biggest triathlons where athletes will race through the capital on a landmark-filled route. London is calling!
- Newcomers
- Event village
- Age 17 & over
- Half Ironman
- Sprint triathlon
- Olympic triathlon
- Sat 9 Aug 2025
- £40-£120
- Sat 9 Aug 2025
- £40-£120
Dorney Triathlon | August
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Recycling
- Newcomers
- Event village
- Sustainability policy
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- + 1 more race
- Sun 10 Aug 2025
- £53-£94
- Sun 10 Aug 2025
- £53-£94
ATW St Neots Triathlon | Race 3
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
- Newcomers
- Event village
- Park
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sun 17 Aug 2025
- £53-£95
- Sun 17 Aug 2025
- £53-£95
ATW Oundle Triathlon
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.
- Newcomers
- Event village
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 17 Aug 2025
- £16-£28
- Sun 17 Aug 2025
- £16-£28
ATW Oundle Children’s Triathlon
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
- Families
- Newcomers
- Event village
- Age 8 & over
- Kids triathlon 5
- Wed 27 Aug 2025
- £58-£78
- Wed 27 Aug 2025
- £58-£78
Midweek Dorney Triathlon | August
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Recycling
- Newcomers
- Event village
- Sustainability policy
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Fri 29 - Sun 31 Aug 2025
- £10-£545
- Fri 29 - Sun 31 Aug 2025
- £10-£545
Long Course Weekend Yorkshire
The Long Course Weekend Yorkshire is back for a second year! A huge multi-sport festival in stunning Nidderdale featuring runs, rides, triple-style challenges and junior events too.
- Families
- Newcomers
- Event village
- Event expo
- Rural
- Age 4 & over
- Lake swim 2
- Long sportive
- Medium sportive
- Marathon
- Half marathon
- + 6 more races
- Sun 17 Aug 2025
Buckinghamshire Triathlon
- Novice triathlon 3
- Super sprint triathlon
- Sprint triathlon
- Sun 24 Aug 2025
West Lancs Summer Triathlon, Duathlon & Aquathlon
- Sprint triathlon
- Sprint duathlon
- Sprint aquathlon