Triathlons near me | South East | 2024/2025

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.

Sun 26 May
£55-£75

Sun 26 May
£55-£75

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

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.

Sun 16 Jun
£55-£75

Sun 16 Jun
£55-£75

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

Join this exhilarating Endurance Weekend in the stunning Chiltern Hills! Whether you seek a weekend of endurance, picturesque sights or a chance to bond with fellow athletes, this is your opportunity!

Fri 21 - Sun 23 Jun
£100-£125

Fri 21 - Sun 23 Jun
£100-£125

Chesham, Buckinghamshire, UK

ATW Chiltern Endurance Weekend

Join this exhilarating Endurance Weekend in the stunning Chiltern Hills! Whether you seek a weekend of endurance, picturesque sights or a chance to bond with fellow athletes, this is your opportunity!

Families
Recycling
Newcomers
Event village
Rural
Sustainability policy
Age 18 & over

Lake swim 6
Ironman
Half Ironman
Long sportive 2
Medium sportive 2
+ 7 more races

A superb summer's day of running and triathlon at the stunning Olympic venue which boasts fast, flat courses with closed roads and ideal swimming conditions. A must for your schedule this year.

Sat 6 Jul
£60

Sat 6 Jul
£60

Windsor, Buckinghamshire, UK

FixAddiction Triathlon, 5K, 10K & Half Marathon

A superb summer's day of running and triathlon at the stunning Olympic venue which boasts fast, flat courses with closed roads and ideal swimming conditions. A must for your schedule this year.

Wheelchair users
Newcomers
Event village
Park
Age 15 & over

Super sprint triathlon
Sprint triathlon
5K run
10K run
Half marathon

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.

Sun 14 Jul
£59-£89

Sun 14 Jul
£59-£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 14 Jul
£65-£110

Sun 14 Jul
£65-£110

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

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.

Sun 22 Sep
£65-£110

Sun 22 Sep
£65-£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

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.

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.