- Sun 26 May
- £45-£55
- Sun 26 May
- £45-£55
Marlow, Buckinghamshire, UK
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
Windsor, Buckinghamshire, UK
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
Marlow, Buckinghamshire, UK
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
- Sun 22 Sep
- £50-£80
- Sun 22 Sep
- £50-£80
Marlow, Buckinghamshire, UK
The One on the River | Henley
Taking place across the scenic Thames Valley area with routes going through Culden Faw Estate. Swim the river, cycle the hilly open roads, run through the trail paths enjoying great views.
- Newcomers
- Event village
- Park
- Sustainability policy
- Age 17 & over
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sprint aquabike
- Standard aquabike
- + 4 more races
- Sat 28 - Sun 29 Sep
- £52-£70
- Sat 28 - Sun 29 Sep
- £52-£70
Edenbridge, Kent, UK
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
- Sat 4 May
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Mon 6 May
Tonbridge, Kent, UK
Tonbridge Triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquathlon
- Sprint aquabike
- Sun 12 May
Ringwood, Hampshire, UK
The Huntsman Triathlon
- Middle aquabike
- Sprint duathlon
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sun 12 May
East Grinstead, West Sussex, UK
The East Grinstead Triathlon
- Novice triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 19 May
Arundel, West Sussex, UK
Arundel Lido Triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 19 May
Banbury, Oxfordshire, UK
Banbury Triathlon
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Wed 29 May
Windsor, Buckinghamshire, UK
Dorney Evening Triathlon
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sat 8 Jun
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 16 Jun
Burgess Hill, West Sussex, UK
Mid Sussex Triathlon
- Novice triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 16 Jun
Brockenhurst, Hampshire, UK
The Swashbuckler Triathlon
- Middle aquabike
- Olympic triathlon
- Half Ironman
- Sun 23 Jun
Dartford, Kent, UK
The 15th Dartford Bridge Triathlon
- Novice triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Wed 3 Jul
Windsor, Buckinghamshire, UK
Dorney Evening Triathlon
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sat 13 Jul
Windsor, Buckinghamshire, UK
Arctic One Tri and Paratri Festival
- Sprint triathlon 4
- Super sprint triathlon 4
- Sprint aquabike
- Sun 14 Jul
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 14 Jul
Billingshurst, West Sussex, UK
The KidstriUK Billingshurst Charity Multi-sport Festival
- Kids duathlon 2
- Kids triathlon 8
- Kids aquathlon 2
- Kids aquabike 2
- Fun run 2
- Wed 7 Aug
Windsor, Buckinghamshire, UK
Dorney Evening Triathlon
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sat 10 Aug
Henley-on-Thames, Buckinghamshire, UK
Conquer The Chilterns Triathlon
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sprint aquabike
- Standard aquabike
- + 1 more race
- Sun 11 Aug
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 1 Sep
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 1 Sep
Ringwood, Hampshire, UK
New Forest Middle Distance Triathlon
- Sprint duathlon
- Middle aquabike
- Sprint triathlon
- Olympic triathlon
- Half Ironman