154 Triathlons in South East

Find triathlons near me in South East for 2024/2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Click an event for full event details, location, route, sustainability, what's included and how to enter.

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
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 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.

  • 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 14 Apr
Woking, Surrey, UK

Woking Triathlon - Spring

  • Kids aquathlon 5
  • Sprint aquathlon
  • Super sprint triathlon
  • Sprint triathlon
  • Sun 21 Apr
Ringwood, Hampshire, UK

Ringwood Triathlon

  • Sprint triathlon
  • Sprint aquabike
  • Sprint aquathlon
  • Sun 28 Apr
Sevenoaks, Kent, UK

7Oaks Triathlon

  • 400 m pool swimming
  • 25 km road cycling
  • 5 km road running
  • Sun 28 Apr
Southampton, Hampshire, UK

Southampton Fast Twitch

  • 400 m pool swimming
  • 20 km road cycling
  • 4.9 km road running
  • 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
  • Mon 6 May
Winchester, Hampshire, UK

Winchester Triathlon

  • Kids triathlon
  • Novice triathlon
  • Sprint triathlon
  • 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 12 May
Hythe, Kent, UK

Hythe Bay Triathlon

  • 250 m pool swimming
  • 16 km road cycling
  • 5 km road running
  • 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
  • Sun 26 May
Wadhurst, East Sussex, UK

Bewl Water Triathlon

  • Sprint triathlon
  • Olympic triathlon
  • Wed 29 May
Windsor, Buckinghamshire, UK

Dorney Evening Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Sat 1 Jun
Henley-on-Thames, Oxfordshire, UK

UK Kids Fun Triathlon Henley-on-Thames

  • Kids triathlon 9
  • Sat 1 - Sun 2 Jun
Woodstock, Oxfordshire, UK

Blenheim Palace Triathlon

  • Super sprint triathlon 2
  • Sprint triathlon 2
  • Sun 2 Jun
Henley-on-Thames, Oxfordshire, UK

Henley Triathlon

  • Novice triathlon 2
  • Super sprint triathlon
  • Sprint triathlon
  • Sun 2 Jun
Dover, Kent, UK

White Cliffs Sprint Triathlon & Junior Aquathlon

  • Kids aquathlon 4
  • Sprint triathlon
  • Sat 8 Jun
Windsor, Buckinghamshire, UK

Dorney Triathlon and Aquabike

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • Sun 9 Jun
Windsor, Berkshire, UK

Royal Windsor Triathlon

  • Sprint triathlon
  • Olympic triathlon
  • Sun 9 Jun
Swanley, Kent, UK

White Oak Triathlon

  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Sun 16 Jun
Burgess Hill, West Sussex, UK

Mid Sussex Triathlon

  • Novice triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Sun 16 Jun
Buckingham, Buckinghamshire, UK

Beachborough & Brackley Triathlon

  • Kids triathlon 5
  • Relay triathlon 5
  • 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
  • Sun 23 Jun
Wallingford, Oxfordshire, UK

Oxfordshire Triathlon - Sprint

  • 750 m lake swimming
  • 20 km road cycling
  • 5 km road running
  • Fri 28 Jun
Windsor, Berkshire, UK

JLL Property Triathlon

  • Sprint triathlon
  • Sprint duathlon
  • Lake swim
  • 5K run
  • Wed 3 Jul
Windsor, Buckinghamshire, UK

Dorney Evening Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Sun 7 Jul
Bicester, Oxfordshire, UK

Bicester Junior Triathlon

  • Kids triathlon 5
  • Sun 7 Jul
Chichester, West Sussex, UK

Goodwood Duathlon

  • Sprint duathlon
  • Standard duathlon
  • 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
  • Sun 21 Jul
Guildford, Surrey, UK

Guildford Triathlon

  • Kids aquathlon 4
  • Sprint triathlon
  • Sun 21 Jul
Windsor, Buckinghamshire, UK

Eton Dorney Family Triathlon

  • Kids triathlon 5
  • Novice triathlon
  • Super sprint triathlon
  • Sprint triathlon
  • Sun 21 Jul
Southampton, Hampshire, UK

Holly Hill Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Wed 7 Aug
Windsor, Buckinghamshire, UK

Dorney Evening Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint 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
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
Ringwood, Hampshire, UK

New Forest Middle Distance Triathlon

  • Sprint duathlon
  • Middle aquabike
  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • 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 15 Sep
Woking, Surrey, UK

Woking Triathlon - Autumn

  • Kids aquathlon 5
  • Sprint aquathlon
  • Super sprint triathlon
  • Sprint triathlon
  • Sun 22 Sep
Windsor, Buckinghamshire, UK

Eton Dorney Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sun 6 Oct
Andover, Hampshire, UK

Thruxton Mass Attack Duathlon

  • Sprint duathlon
  • Standard duathlon

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