- Sun 26 May
- £45-£55
- Sun 26 May
- £45-£55
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
- £45-£55
- Sun 16 Jun
- £45-£55
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
- £50-£80
- Sun 14 Jul
- £50-£80
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
- £40-£65
- Sat 28 - Sun 29 Sep
- £40-£65
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 21 Apr
Ringwood Triathlon
- Sprint triathlon
- Sprint aquabike
- Sprint aquathlon
- Mon 6 May
Tonbridge Triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquathlon
- Sprint aquabike
- Tue 14 May
The Bridge Midweek Aquathlon - Race 1
- 500 m lake swimming
- 5 km road running
- Sun 19 May
Arundel Lido Triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 2 Jun
White Cliffs Sprint Triathlon & Junior Aquathlon
- Kids aquathlon 4
- Sprint triathlon
- Wed 5 Jun
Swim the Lake Festival (A)
- Lake swim 3
- Sprint aquathlon
- 5K run
- Tue 11 Jun
The Bridge Midweek Aquathlon - Race 2
- 500 m lake swimming
- 5 km road running
- Tue 9 Jul
The Bridge Midweek Aquathlon - Race 3
- 500 m lake swimming
- 5 km road running
- 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
- Wed 17 Jul
Swim the Lake Festival (B)
- Lake swim 3
- Sprint aquathlon
- 5K run
- Tue 13 Aug
The Bridge Midweek Aquathlon - Race 4
- 500 m lake swimming
- 5 km road running
- Sun 15 Sep
Woking Triathlon - Autumn
- Kids aquathlon 5
- Sprint aquathlon
- Super sprint triathlon
- Sprint triathlon