Triathlon events calendar

Triathlon events calendar

Swim, bike, run: the classic multi-sport challenge!

📷 Photo | THE ROC WALES

561 Triathlons in the UK

Triathlon events combine swimming, cycling and running in that order with a huge range of events with total distances from under 15 km to over 300 miles! Select your location to find triathlons in your area, read more about the distances below or scroll down for the UK's biggest events.

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Triathlon distances

Find out more about common triathlon event distances below to help find your perfect event!

Novice triathlons

Novice triathlons

Take on your first triathlon in one of these short events designed for beginners.

Triathlons for beginners
Super sprint triathlons

Super sprint triathlons

Short events usually involving a 400m swim, 10km bike and 2.5km run.

Super sprints
Sprint triathlons

Sprint triathlons

Ideal for beginners usually involving a 750m swim, 20km bike and 5km run.

Sprint triathlons
Olympic triathlons

Olympic triathlons

Also known as standard triathlons and usually involving a 1500m swim, 40km bike and 10km run.

Standard distance
Half Ironman

Half Ironman

Involving a 1.2 mile swim, a 56 mile bike and 13.1 mile run, these are also known as 70.3 or middle distance triathlons.

Middle distance
Ironman triathlons

Ironman triathlons

Involving a 2.4 mile swim, a 112 mile bike and 26.2 mile run, these are also known as Iron or full distance triathlons.

Full distance
Relay triathlons

Relay triathlons

Experience the triathlon buzz without having to do each leg.

Relay triathlons
Kids triathlons

Kids triathlons

Find an event for your kids using our advanced search with age filter.

Kids triathlons

Triathlons in 2024

Featured events are listed below - select your region to see all events.

An Olympic format mixed Team Relay Triathlon using the fantastic facilities at Torbay Velopark, professionally chip timed over a traffic-free course, BTF affiliated with a great finishers medal.
  • Sat 6 Apr
  • £28-£34
Paignton, Devon, UK

Torbay Triathlon Relay

An Olympic format mixed Team Relay Triathlon using the fantastic facilities at Torbay Velopark, professionally chip timed over a traffic-free course, BTF affiliated with a great finishers medal.

  • 300 m pool swimming
  • 6 km road cycling
  • 1.8 km multi terrain running
A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.
  • Sun 7 Apr
  • £21-£51
Paignton, Devon, UK

Torbay Triathlon Spring

A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.

  • Sprint triathlon
  • Novice triathlon
  • Kids triathlon 7
Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.
  • Sat 13 Apr
  • £5
Paignton, Devon, UK

Swim Bike Run Torbay

Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.

  • Kids triathlon
  • Novice triathlon 3
A coastal triathlon for triathletes of all abilities from absolute beginner to elite, offering Sprint and Novice options. A pool-based swim, seafront cycle and pan flat run along the Exe Estuary path.
  • Sun 21 Apr
  • £30-£45
Exmouth, Devon, UK

Exmouth Triathlon

A coastal triathlon for triathletes of all abilities from absolute beginner to elite, offering Sprint and Novice options. A pool-based swim, seafront cycle and pan flat run along the Exe Estuary path.

  • Sprint triathlon
  • Novice triathlon
Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.
  • Sat 4 May
  • £5
Paignton, Devon, UK

Swim Bike Run Torbay

Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.

  • Kids triathlon
  • Novice triathlon 3
The totally unique ROC format, from Abersoch Bay to the top of Wales’ highest mountain and back. Swim, Bike, Mountain, Bike, Run; THE ROC WALES is triathlon - tough and redefined.
  • Sat 11 May
  • £230-£240
Pwllheli, Gwynedd, UK

THE ROC WALES

The totally unique ROC format, from Abersoch Bay to the top of Wales’ highest mountain and back. Swim, Bike, Mountain, Bike, Run; THE ROC WALES is triathlon - tough and redefined.

  • 1.5 km sea swimming
  • 100 km road cycling
  • 13 km multi terrain running + 3330 ft ascent
The UK's Number 1 Mountain Festival! Sport, Speakers, Live Music, Activities, Good Times. A full multi-sport and entertainment festival with exciting new changes for 2024!
  • Fri 17 - Sun 19 May
  • £30
Keswick, Cumbria, UK

Keswick Mountain Festival

The UK's Number 1 Mountain Festival! Sport, Speakers, Live Music, Activities, Good Times. A full multi-sport and entertainment festival with exciting new changes for 2024!

  • 5K run
  • 10K run
  • Half marathon
  • 50K ultra run
  • Fell run
  • + 12 more races
This popular weekend of multisport welcomes everyone to a wide range of activities, lively event village, grandstand seating, relay options, youth events plus some exciting new additions!
  • Sat 18 - Sun 19 May
  • £12.84-£267.50
Nottingham, Nottinghamshire, UK

Outlaw Half Nottingham Weekend

This popular weekend of multisport welcomes everyone to a wide range of activities, lively event village, grandstand seating, relay options, youth events plus some exciting new additions!

  • Fun run 2
  • Sprint triathlon
  • Middle aquabike
  • Half Ironman
Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.
  • Sun 19 May
  • £58-£135
Lifton, Devon, UK

Roadford Lake Triathlon

Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
Race through the beautiful grounds and surrounding area of stunning South Galway on an event of your choice from starter to elite then celebrate with friends and family in the festival village.
  • Sat 25 - Sun 26 May
  • £26-£295
Gort, Ireland

Lough Cutra Castle Triathlon and Multisport Festival

Race through the beautiful grounds and surrounding area of stunning South Galway on an event of your choice from starter to elite then celebrate with friends and family in the festival village.

  • Sprint triathlon 3
  • Super sprint triathlon
  • Novice triathlon
  • Sprint duathlon
  • Sprint aquabike
  • + 17 more races
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
  • £20-£75
Marlow, Buckinghamshire, UK

The One on the River | Marlow

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.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Super sprint duathlon
  • Sprint duathlon
  • + 10 more races
One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.
  • Sun 2 Jun
  • £135-£175
Huntingdon, Cambridgeshire, UK

ATW Grafman Middle Distance Triathlon & Aquabike

One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.

  • Half Ironman
  • Standard aquabike
Whichever distance you choose, this triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.
  • Sun 2 Jun
  • £70-£125
Weymouth, Dorset, UK

Weymouth Middle Distance (The WMD) Triathlon

Whichever distance you choose, this triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.

  • Half Ironman
  • Olympic triathlon
  • Sprint triathlon
Race through the Grand Canal and the historic forest and town of Chantilly on an event of your choice from starter to elite then celebrate with friends and family in the festival village.
  • Sat 8 - Sun 9 Jun
  • £28-£295
Chantilly, France

Chateau de Chantilly Triathlon and Multisport Festival

Race through the Grand Canal and the historic forest and town of Chantilly on an event of your choice from starter to elite then celebrate with friends and family in the festival village.

  • Half Ironman
  • Olympic triathlon
  • Sprint triathlon 2
  • Super sprint triathlon
  • Novice triathlon
  • + 10 more races
The successful Dartmouth Triathlon returns for its 9th year! Sea swim, stunning coastal bike route, out and back run including Devon's flattest road, plus chance to camp on the beach!
  • Sun 9 Jun
  • £39-£75
Dartmouth, Devon, UK

Dartmouth Triathlon

The successful Dartmouth Triathlon returns for its 9th year! Sea swim, stunning coastal bike route, out and back run including Devon's flattest road, plus chance to camp on the beach!

  • Olympic triathlon
  • Sprint triathlon
  • Super sprint triathlon
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
  • £23-£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.

  • 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
  • £8-£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!

  • Ironman
  • Half Ironman
  • Lake swim 6
  • Long sportive 2
  • Medium sportive 2
  • + 7 more races
Race through the beautiful grounds of the Cholmondeley Castle estate on an event of your choice from starter to elite then celebrate with friends and family in the festival village.
  • Sat 22 - Sun 23 Jun
  • £28-£295
Malpas, Cheshire, UK

Cholmondeley Castle Triathlon and Multisport Festival

Race through the beautiful grounds of the Cholmondeley Castle estate on an event of your choice from starter to elite then celebrate with friends and family in the festival village.

  • Relay triathlon 2
  • Kids triathlon 4
  • Novice triathlon
  • Super sprint triathlon
  • Sprint triathlon 2
  • + 15 more races
Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. What a venue!
  • Sun 30 Jun
  • £42-£79
Torquay, Devon, UK

English Riviera Triathlon

Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. What a venue!

  • Sprint triathlon
  • Olympic triathlon
  • Novice triathlon
This is the ultimate triathlon. Individuals and teams will conquer the beautiful waters, forests and terrain that give Northumberland and Kielder its unique character.
  • Sun 30 Jun
  • £175-£345
Hexham, Northumberland, UK

The Northumbrian

This is the ultimate triathlon. Individuals and teams will conquer the beautiful waters, forests and terrain that give Northumberland and Kielder its unique character.

  • Ironman
  • Half Ironman
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
  • £22-£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.

  • Super sprint triathlon
  • Sprint triathlon
  • 5K run
  • 10K run
  • Half marathon
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a marathon around the beautiful town of St Neots.
  • Sat 6 Jul
  • £289-£320
Saint Neots, Cambridgeshire, UK

ATW Odyssey Full Distance Triathlon

Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a marathon around the beautiful town of St Neots.

  • 3.8 km river swimming
  • 180 km road cycling
  • 26.2 miles road running
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
  • £25-£110
Marlow, Buckinghamshire, UK

The One on the River | Marlow

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.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Sprint duathlon
  • Standard duathlon
  • + 10 more races
Race through the beautiful grounds and surrounding area of stunning Leicestershire on an event of your choice from starter to elite then celebrate with friends and family in the festival village.
  • Sat 27 - Sun 28 Jul
  • £28-£295
Grantham, Leicestershire, UK

Belvoir Castle Triathlon and Multisport Festival

Race through the beautiful grounds and surrounding area of stunning Leicestershire on an event of your choice from starter to elite then celebrate with friends and family in the festival village.

  • Kids triathlon 4
  • Novice triathlon
  • Super sprint triathlon
  • Sprint triathlon 2
  • Olympic triathlon
  • + 14 more races
Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.
  • Sat 7 Sep
  • £230-£235
Ulverston, Cumbria, UK

THE ROC ENGLAND

Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.

  • 1.5 km lake swimming
  • 92 km road cycling
  • 18.5 km multi terrain running
Triathlons at Dawlish Warren, a safe and supported environment for sea swimming, with a range of triathlon distances to offer a great challenge in a scenic location.
  • Sun 22 Sep
  • £42-£61
Dawlish, Devon, UK

Dawlish Triathlon

Triathlons at Dawlish Warren, a safe and supported environment for sea swimming, with a range of triathlon distances to offer a great challenge in a scenic location.

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquathlon
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
  • £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.

  • 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
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.

  • Half Ironman
  • Olympic triathlon
  • Sprint triathlon 2
  • Super sprint triathlon
  • Novice triathlon
  • + 16 more races
Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.
  • Sat 5 Oct
  • £230-£240
Kinlochleven, Highland, UK

THE ROC SCOTLAND

Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.

  • 1.5 km lake swimming
  • 53 km mountain biking
  • 18.5 km multi terrain running
A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.
  • Sun 6 Oct
  • £18-£42
Paignton, Devon, UK

Torbay Triathlon Autumn

A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.

  • Sprint triathlon
  • Super sprint triathlon
  • Kids triathlon 7
  • Novice triathlon
Tavistock Triathlon is for all ages and abilities using the amazing Olympic legacy 50m pool at Mount Kelly with quiet rolling roads for the bike and the disused railway line for the run. What a venue!
  • Sun 4 May 2025
  • £22-£59
Tavistock, Devon, UK

Tavistock Triathlon

Tavistock Triathlon is for all ages and abilities using the amazing Olympic legacy 50m pool at Mount Kelly with quiet rolling roads for the bike and the disused railway line for the run. What a venue!

  • Olympic triathlon
  • Sprint triathlon
  • Novice triathlon
  • Kids triathlon 5

Triathlon guides

Guides, tips and advice on triathlon events.

7 things we learned from a 70.3 triathlon
  • 15 mins read
  • 18 May 2023

7 things we learned from a 70.3 triathlon

Humbling and exhilarating in equal measures, a half Ironman triathlon is an unforgettable experience - following these hard-learned tips will make sure that's for all the right reasons.

Enter your first triathlon
  • 10 mins read
  • 7 Dec 2022

Enter your first triathlon

This dynamic multi-sport will test your speed and stamina, providing an incredible experience along the way! We've got everything you need for your first swim-bike-run right here.