63 Triathlons in South East in July 2023

Find triathlons in and around South East - filter events by date, display on a map or use the advanced search to find your perfect race.

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Full and middle distance triathlons on the Sunshine Coast where athletes of all abilities can experience the beauty of the South Downs, starting with a spectacular jump from the historic pier!
  • Sun 9 Jul
  • £180-£390
Eastbourne, East Sussex, UK

IronBourne Long Distance Triathlon

Full and middle distance triathlons on the Sunshine Coast where athletes of all abilities can experience the beauty of the South Downs, starting with a spectacular jump from the historic pier!

  • Ironman
  • Half Ironman
  • Long aquabike
  • Middle aquabike
  • Sea swim
  • + 1 more races
Ready for a serious challenge? Middle to ultra distance triathlon, duathlon, aquabike, aquathlon, swim and run events based at Hever Castle itself with routes into Ashdown Forest and the South Downs.
  • Sun 9 Jul
  • £240-£495
Edenbridge, Kent, UK

Hever Castle Festival of Endurance

Ready for a serious challenge? Middle to ultra distance triathlon, duathlon, aquabike, aquathlon, swim and run events based at Hever Castle itself with routes into Ashdown Forest and the South Downs.

  • Half Ironman
  • Ironman
  • Middle duathlon
  • Long duathlon
  • Middle aquabike
  • + 11 more races
  • Sun 2 Jul
  • £25-£44
Aylesford, Kent, UK

Ocean Lake Triathlon Sprint Triathlon 2

This is a beautiful open water race series of 2 events suitable for novices, age group and elite athletes looking for 400m, 750m distances to practice.

  • Novice triathlon
  • Sprint triathlon
  • Wed 5 Jul
  • £49-£76
Windsor, Buckinghamshire, UK

Dorney Evening

Take on a Sprint or Super Sprint distance triathlon around Dorney Lake in 2023 and take the opportunity to race around this unique and inspiring Olympic venue!

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Wed 5 Jul
  • £49-£76
Windsor, Buckinghamshire, UK

Dorney Evening Triathlon

Take on a Sprint or Super Sprint distance triathlon around Dorney Lake in 2023 and take the opportunity to race around this unique and inspiring Olympic venue!

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Sun 9 Jul
  • £65-£125
Marlow, Buckinghamshire, UK

The One on The River - Summer Edition

The One on The River takes place across the scenic Thames Valley area.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Sprint aquabike
  • Standard aquabike
  • + 4 more races
  • Sun 9 Jul
  • £50-£56
Guildford, Surrey, UK

Guildford

Take on a Sprint triathlon or Aquathlon around Guildford in 2023 and take the opportunity to race around this unique venue!

  • Kids aquathlon 4
  • Sprint triathlon
  • Sun 9 Jul
  • FREE
Walton-on-Thames, Surrey, UK

World's 1st FreeTri Series - Walton

Triathlon, isn't that a sport for olympians that requires super human fitness and expensive gear?

  • Kids triathlon 2
  • Novice triathlon
  • Super sprint triathlon
  • Sun 9 Jul
  • £24-£35
Dartford, Kent, UK

Dartford Bridge Triathlon

The 7th Bridge Children’s Triathlon will take place in 2023.

  • Kids triathlon 6
  • Super sprint triathlon
  • Sun 16 Jul
  • £21-£27
Billingshurst, West Sussex, UK

The KidstriUK Billingshurst Triathlon

Welcome to the award-winning KidstriUK Billingshurst Triathlon which is an encouraging way for young people to try the sport out for the first time!

  • Kids duathlon 2
  • Novice triathlon 2
  • Kids triathlon 5
  • Sun 16 Jul
  • £70-£105
Windsor, Buckinghamshire, UK

Dorney Triathlon

Take on a Sprint or Standard distance triathlon around Dorney Lake in 2023 and take the opportunity to race around this unique and inspiring Olympic venue!

  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • Sat 22 Jul
  • £30-£35
Henley-on-Thames, Oxfordshire, UK

UK Kids Fun Triathlon Henley-on-Thames

The Henley UK Kids Fun Triathlon is now in its 11th year and held within the grounds of Henley Leisure Centre & Gillotts School,

  • Kids triathlon 9
  • Sun 23 Jul
  • £70-£89
Henley-on-Thames, Oxfordshire, UK

Henley Triathlon

Join UK Triathlon for the 14th year of this popular event taking place at Henley Leisure Centre and within the grounds of Gillotts School.

  • Novice triathlon 2
  • Super sprint triathlon
  • Sprint triathlon
  • Sun 23 Jul
  • £36-£59.50
Windsor, Buckinghamshire, UK

Eton Dorney Family Triathlon

Eton Dorney Family Triathlon sees the return of junior racing to Dorney Lake alongside one and only sprint triathlon event at the venue.

  • Kids triathlon 5
  • Novice triathlon
  • Super sprint triathlon
  • Sprint triathlon
  • Sat 1 Jul
  • £111
Windsor, Buckinghamshire, UK

Banana Triathlon | Bunch of Bananas

The Banana Triathlon is in the middle of our three event series, welcoming triathletes to Dorney Lake every summer.

  • 800 m lake swimming
  • 31.8 km road cycling
  • 7.5 km road running
  • Sat 1 Jul
  • £39.99
Windsor, Buckinghamshire, UK

Banana Triathlon | Banana Split (15+ years)

The Banana Triathlon is in the middle of our three event series, welcoming triathletes to Dorney Lake every summer.

  • 200 m lake swimming
  • 5.3 km road cycling
  • 2.5 km road running
  • Sat 1 Jul
  • £39.99
Windsor, Buckinghamshire, UK

Banana Triathlon | Banana Split (11-14 years)

The Banana Triathlon is in the middle of our three event series, welcoming triathletes to Dorney Lake every summer.

  • 200 m lake swimming
  • 5.3 km road cycling
  • 1.8 km road running
  • Sun 2 Jul
  • £55-£80
Wallingford, Oxfordshire, UK

The Oxfordshire Triathlon Series - July

The Oxfordshire Triathlon Series for 2023 will consist of 2 races spread across the summer, July and August.

  • 1 km lake swimming
  • 35 km road cycling
  • 7.5 km road running
  • Sun 2 Jul
  • £65-£71
Chertsey, Surrey, UK

Thorpe Park Sprint Triathlon

Join RunThrough Events for the Brand New Thorpe Park Sprint Triathlon in 2023

  • 750 m lake swimming
  • 20 km road cycling
  • 5 km road running
  • Sat 8 Jul
  • £60
Windsor, Buckinghamshire, UK

FixAddiction Triathlon

Get involved in this superb summer triathlon. Enjoy a great day out and make sure you bring your sunscreen!

  • 400 m lake swimming
  • 20 km road cycling
  • 5 km road running
  • Sun 9 Jul
  • £50-£75
Whitstable, Kent, UK

Active Life Oysterman Triathlon

This is a very unique sprint distance event consisting of a 500m sea swim followed by a 20km cycle and finishing with a stunning yet flat 5km coastal run.

  • 500 m sea swimming
  • 20 km road cycling
  • 5 km road running
  • Sat 22 Jul
  • £195-£235
Windsor, Buckinghamshire, UK

Castle to Coast Triathlon

An Epic Point To Point Adventure

  • 1.2 miles lake swimming
  • 66 miles road cycling
  • 14 miles trail running