- Sun 26 May
- £50-£60
- Sun 26 May
- £50-£60
The One on the River | Marlow | May
Taking place across the scenic Thames Valley area. Swim the river, cycle the hilly open roads, or run the flat Thames path – with a selection of activities over grass, tarmac, and trail.
- Newcomers
- Event village
- Park
- Sustainability policy
- Age 17 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Super sprint duathlon
- Sprint duathlon
- + 10 more races
- Sun 16 Jun
- £50-£60
- Sun 16 Jun
- £50-£60
The One for the Planet powered by Climategames
Set at the spectacular, flat, and smooth-surfaced Dorney Lake near Windsor, this multi-sport event is for the ones that enjoy being by the water and offers a selection of activities for all levels.
- Families
- Wheelchair users
- Newcomers
- Event village
- Sustainability policy
- Age 17 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Super sprint duathlon
- Sprint duathlon
- + 13 more races
- Sun 14 Jul
- £55-£85
- Sun 14 Jul
- £55-£85
The One on the River | Marlow | Jul
Taking place across the scenic Thames Valley area. Swim the river, cycle the hilly open roads, or run the flat Thames path – with a selection of activities over grass, tarmac, and trail.
- Newcomers
- Event village
- Park
- Sustainability policy
- Age 17 & over
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sprint duathlon
- Standard duathlon
- + 10 more races
- Sat 28 - Sun 29 Sep
- £60-£90
- Sat 28 - Sun 29 Sep
- £60-£90
Hever Castle Triathlon and Multisport Festival
Race through the beautiful grounds and surrounding area of Hever Castle on an event of your choice from starter to elite then celebrate with friends and family in the festival village.
- Families
- Recycling
- Newcomers
- Event village
- Park
- Rural
- Sustainability policy
- Age 15 & over
- Half Ironman
- Olympic triathlon
- Sprint triathlon 2
- Super sprint triathlon
- Novice triathlon
- + 16 more races
- Sun 12 May
The Huntsman Triathlon
- Middle aquabike
- Sprint duathlon
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sun 2 Jun
The KidstriUK Worthing Charity Duathlon and 2K Run Event
- Kids duathlon 8
- Fun run 2
- Fri 28 Jun
JLL Property Triathlon
- Sprint triathlon
- Sprint duathlon
- Lake swim
- 5K run
- Sun 14 Jul
The KidstriUK Billingshurst Charity Multi-sport Festival
- Kids duathlon 2
- Kids triathlon 8
- Kids aquathlon 2
- Kids aquabike 2
- Fun run 2
- Sun 1 Sep
New Forest Middle Distance Triathlon
- Sprint duathlon
- Middle aquabike
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sun 13 Oct
Deviation Duathlon
- Sprint duathlon
- Standard duathlon
- Long duathlon
- Sun 10 Nov
Dorney Lake Duathlon
- Super sprint duathlon
- Sprint duathlon
- Standard duathlon
- Sun 15 Dec
Dorney Lake Duathlon
- Super sprint duathlon
- Sprint duathlon
- Standard duathlon