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Triathlons in UK in May 2025

Find triathlons near me in UK in May 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.

Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
  • Sun 4 May
  • £53-£94
  • Sun 4 May
  • £53-£94
Saint Neots, Cambridgeshire, UK

ATW St Neots Triathlon | Race 1

Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.

  • Newcomers
  • Event village
  • Park
  • Age 15 & over
  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Standard aquabike
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!
  • Mon 5 May
  • £22-£59
  • Mon 5 May
  • £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!

  • Trees not tees
  • Recycling
  • Dogs allowed
  • Rural
  • Sustainability policy
  • Age 5 & over
  • Olympic triathlon
  • Sprint triathlon
  • Novice triathlon
  • Kids triathlon 5
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 10 May
  • £240-£260
  • Sat 10 May
  • £240-£260
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.

  • Recycling
  • Plastic bottle free
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • Hilly
  • Mountainous
  • Event village
  • Event expo
  • Coast
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • 1.5 km sea swimming
  • 100 km road cycling
  • 13 km multi terrain running + 3330 ft ascent
This is a great race for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.
  • Sun 11 May
  • £44-£49
  • Sun 11 May
  • £44-£49
Hatfield, Hertfordshire, UK

HSV Sprint Triathlon & Aquabike

This is a great race for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.

  • Newcomers
  • Event village
  • Urban
  • Age 15 & over
  • Sprint triathlon
  • Sprint aquabike
The UK's top outdoor sports festival! Incredible entertainment, sports events, speakers, live music, activities, brand expo, bars, food, drink and much more.
  • Fri 16 - Sun 18 May
  • £30
  • Fri 16 - Sun 18 May
  • £30
Keswick, Cumbria, UK

Keswick Mountain Festival

The UK's top outdoor sports festival! Incredible entertainment, sports events, speakers, live music, activities, brand expo, bars, food, drink and much more.

  • Families
  • Wheelchair users
  • Newcomers
  • Dogs allowed
  • Entertainment
  • Music
  • Enter online
  • Event village
  • Event expo
  • Park
  • Rural
  • Mountains
  • All ages
  • 5K run 2
  • 10K run
  • Half marathon
  • 50K ultra run
  • Fell run
  • + 12 more races
A choice of multi-sports events including triathlon, relay triathlon and aquabike at a stunning watersports venue with immaculate water quality, scenic routes, a custom designed medal and much more.
  • Sat 17 - Sun 18 May
  • £68-£140
  • Sat 17 - Sun 18 May
  • £68-£140
Bedford, Bedfordshire, UK

ATW Box End Triathlon

A choice of multi-sports events including triathlon, relay triathlon and aquabike at a stunning watersports venue with immaculate water quality, scenic routes, a custom designed medal and much more.

  • Newcomers
  • Event village
  • Park
  • Age 15 & over
  • Sprint triathlon
  • Sprint aquabike
  • Olympic triathlon
  • Standard aquabike
  • Half Ironman
  • + 1 more race
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 18 May
  • £58-£135
  • Sun 18 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.

  • Families
  • Trees not tees
  • Recycling
  • Newcomers
  • Event village
  • Rural
  • Sustainability policy
  • Plastic-free event
  • Age 15 & over
  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Sun 25 May
  • £58-£120
  • Sun 25 May
  • £58-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | May

Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
Bike past historic landmarks, and run beside the Great Feild at Poundbury. As you finish each leg of the course, you’ll get closer to the crowds of people cheering you on at that final stretch.
  • Sun 25 May
  • £41.50
  • Sun 25 May
  • £41.50
Dorchester, Dorset, UK

The Dorchester Sprint Triathlon

Bike past historic landmarks, and run beside the Great Feild at Poundbury. As you finish each leg of the course, you’ll get closer to the crowds of people cheering you on at that final stretch.

  • Newcomers
  • Enter online
  • Undulating
  • Event village
  • Plastic-free event
  • Age 16 & over
  • 300 m pool swimming
  • 21 km road cycling
  • 5 km road running
Incorporating Sprint Triathlon 2026 World Championships Qualifier! Dorney Lake Events provides you with an opportunity to race like an elite around this unique and inspiring Olympic venue.
  • Sun 25 May
  • £80
  • Sun 25 May
  • £80
Windsor, Buckinghamshire, UK

Dorney Lake Draft-Legal Triathlon

Incorporating Sprint Triathlon 2026 World Championships Qualifier! Dorney Lake Events provides you with an opportunity to race like an elite around this unique and inspiring Olympic venue.

  • Newcomers
  • Enter online
  • Flat
  • Event village
  • Age 15 & over
  • 750 m lake swimming
  • 19 km road cycling
  • 5 km road running
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Wed 28 May
  • £58-£78
  • Wed 28 May
  • £58-£78
Windsor, Buckinghamshire, UK

Midweek Dorney Triathlon | May

Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Fri 2 - Sun 4 May
Shifnal, Staffordshire, UK

XTERRA Weston Park

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon 2
  • Sprint duathlon
  • Standard duathlon
  • Sat 3 May
Calne, Wiltshire, UK

Oldbury White Horse Children’s Triathlon

  • Kids triathlon 5
  • Fun run
  • Sun 4 May
Calne, Wiltshire, UK

Oldbury White Horse Sprint Events

  • Sprint triathlon
  • Sprint duathlon
  • Sprint aquabike
  • Sprint aquathlon
  • Fun run
  • Sun 4 May
Bolton, Greater Manchester, UK

Horwich Triathlon, Duathlon & Aquathlon

  • Sprint triathlon
  • Olympic triathlon
  • Sprint duathlon
  • Standard duathlon
  • Sprint aquathlon
  • + 1 more race
  • Sun 4 May
Saffron Walden, Essex, UK

Walden Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Sun 4 May
Tavistock, Devon, UK

BUCS Triathlon: Sprint & Mixed Relay Championships

  • Sprint triathlon
  • Relay triathlon
  • Mon 5 May
Hampton, UK

Thames Turbo Sprint Triathlon

  • Super sprint triathlon
  • Sprint triathlon
  • Mon 5 May
Tonbridge, Kent, UK

Tonbridge Triathlon

  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquathlon
  • Sprint aquabike
  • Mon 5 May
Winchester, Hampshire, UK

Winchester Triathlon

  • Kids triathlon
  • Novice triathlon
  • Sprint triathlon
  • Mon 5 May
Grantham, Lincolnshire, UK

Tridents Grantham Triathlon

  • 400 m pool swimming
  • 24 km road cycling
  • 5 km road running
  • Mon 5 May
Tadcaster, North Yorkshire, UK

Tad Tri

  • 400 m pool swimming
  • 13 km road cycling
  • 6 km road running
  • Fri 9 - Sun 11 May
Stamford, Cambridgeshire, UK

Burghley Multisport Weekend

  • Lake swim 7
  • Sprint triathlon 2
  • Olympic triathlon 2
  • Half Ironman
  • Standard aquabike 2
  • + 5 more races
  • Sat 10 - Sun 11 May
Morpeth, Northumberland, UK

TRAILDOG MultiSport

  • CaniCross 2
  • Super sprint duathlon 2
  • Novice triathlon 2
  • Sprint aquathlon 2
  • Sat 17 - Sun 18 May
Nottingham, Nottinghamshire, UK

Outlaw Half Nottingham Weekend

  • Fun run 2
  • Sprint triathlon
  • Middle aquabike
  • Half Ironman

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