- Sun 22 Sep
- £25-£110
- Sun 22 Sep
- £25-£110
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
- £28-£295
- Sat 28 - Sun 29 Sep
- £28-£295
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 9 & over
- Half Ironman
- Olympic triathlon
- Sprint triathlon 2
- Super sprint triathlon
- Novice triathlon
- + 16 more races
- Sun 17 Aug 2025
- £60-£89
- Sun 17 Aug 2025
- £60-£89
Chesham, Buckinghamshire, UK
Buckinghamshire Triathlon
A fabulous challenging day of triathlon at an accessible location with a range of waves and maximum support for inclusivity all-round, whether complete beginner or seasoned Sprint professional.
- Newcomers
- Event village
- Age 16 & over
- Novice triathlon 3
- Super sprint triathlon
- Sprint triathlon
- Sun 28 Jul
Aylesford, Kent, UK
Ocean Lake Sunday Sprint Triathlon and Aquathlons
- Sprint triathlon
- Sprint aquathlon 3
- Standard aquathlon
- Sun 4 Aug
Olney, Buckinghamshire, UK
Cowman Triathlon & Aquabike
- Sprint aquabike
- Standard aquabike
- Middle aquabike
- Sprint triathlon
- Olympic triathlon
- + 1 more race
- 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
- Sat 10 Aug
Dartford, Kent, UK
Midnight Man
- Sprint triathlon 2
- Olympic triathlon
- Ironman
- Middle aquabike
- Long aquabike
- Sun 11 Aug
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 18 Aug
Hythe, Kent, UK
Hythe Bay Triathlon
- 250 m pool swimming
- 16 km road cycling
- 5 km road running
- Sun 18 Aug
Wallingford, Oxfordshire, UK
Oxfordshire Triathlon - Olympic
- 1500 m lake swimming
- 40 km road cycling
- 10 km road running
- Sun 1 Sep
Windsor, Buckinghamshire, UK
Dorney Triathlon and Aquabike
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 1 Sep
Bexhill-on-Sea, East Sussex, UK
The 1066 Triathlon
- Sprint triathlon
- Sprint aquabike
- Olympic triathlon
- Standard aquabike
- Half Ironman
- + 1 more race
- Sun 1 Sep
Brighton, East Sussex, UK
Brighton & Hove Triathlon
- Super sprint triathlon 2
- Sprint triathlon
- Olympic triathlon
- Sea swim
- Sprint aquathlon
- + 5 more races
- Sun 1 Sep
Ringwood, Hampshire, UK
New Forest Middle Distance Triathlon
- Sprint duathlon
- Middle aquabike
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sun 1 Sep
Newbury, Berkshire, UK
Newbury Triathlon
- 300 m pool swimming
- 22 km road cycling
- 5 km trail running
- Sun 8 Sep
Reading, Berkshire, UK
Reading Triathlon
- Sprint aquathlon
- Standard aquabike
- Sprint triathlon
- Relay triathlon
- Olympic triathlon
- Sun 8 Sep
Horsham, West Sussex, UK
Southwater Triathlon Relays
- 400 m lake swimming
- 18.5 km road cycling
- 3.8 km road running
- Sun 8 Sep
Betchworth, Surrey, UK
Tri Reigate Sprint Triathlon
- 750 m lake swimming
- 19 km road cycling
- 5 km road running
- Sun 15 Sep
Woking, Surrey, UK
Woking Triathlon - Autumn
- Kids aquathlon 5
- Sprint aquathlon
- Super sprint triathlon
- Sprint triathlon
- Sun 15 Sep
Bognor Regis, West Sussex, UK
The Bognor Charity Muliti-sport Festival
- Novice triathlon 2
- Kids triathlon 6
- Kids duathlon 2
- Kids aquathlon 2
- Kids aquabike 2
- + 2 more races
- Sun 22 Sep
Windsor, Buckinghamshire, UK
Eton Dorney Triathlon
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
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