## Triathlons in the UK

The triathlon is a multi-sport event combining swimming, cycling and running. The length and duration of these events can vary greatly, ranging from just a few miles to 140 plus. In addition, conditions in competition can differ from event to event. The swim could be in an indoor pool or the sea, and cycling or running on flat coastal roads or rolling countryside hills.

The UK plays host to some of the best triathlon events in the world. Large scale events such as the [ITU Worlds Triathlon Leeds](https://www.letsdothis.com/gb/e/aj-bell-world-triathlon-leeds-25543) and [London Triathlon](https://www.letsdothis.com/gb/e/the-aj-bell-london-triathlon-21041) host athletes of all levels of experience with big crowds building a buzzing atmosphere. 

## What’s the best UK triathlon event for me?

On Let's Do This, you can refine your search for a triathlon by exploring different race distances.

The [Super-Sprint distance](https://www.letsdothis.com/gb/triathlon-events/super-sprint) (400m, 10k, 2.5k) and [Sprint distance](https://www.letsdothis.com/gb/triathlon-events/sprint) (750m, 20k, 5k) triathlons are great for beginners looking to explore multi-sport. These events can be attempted without much prior training.  But if you want to be competitive you should practice your transitions as they can make a big difference to your time. 

[Olympic distance triathlons](https://www.letsdothis.com/gb/triathlon-events/olympic) (1.5k, 40k, 10k) are the standard distance for international competition. To be competitive here, you’ll need to take your training seriously. If you can finish one of these in under 3 hours, kudos to you.

The final two distances are the [Middle Distance / Half Ironman](https://www.letsdothis.com/gb/triathlon-events/half-ironman) (1.9k, 90k, 21.1k) and the [Full Distance / Ironman](https://www.letsdothis.com/gb/triathlon-events/ironman) (3.8k, 180k, 42.2k). Finishing these events is an achievement in itself. If you have trained well for a Half Ironman you could be pushing for under 6 hours for men and 7 for women. For the full distance, anything under the 17hr cut off point is a solid accomplishment, but under 13 hours (men) and 14 hours (women) deserves serious respect.

By far the most popular multidisciplinary sport, a triathlon combines swimming, cycling and running in sequence. There are five officially recognised distances and plenty more for the fun of it. Whether it’s your very first triathlon or your 50th, there are incredible events for all levels running up and down the whole country. 

Find hundreds of the best UK triathlon events on Let’s Do This, with races to book for every level. No matter which time of the year you’re looking to compete, discover triathlons near you today.

Triathlons

Experience stunning scenery, culture and sport at the Blenheim Palace Triathlon, taking place from 7 - 8 June 2025.This iconic event offers both beginner-friendly and advanced challenges, and is the perfect day out for the whole family.This is the only triathlon in the world to be located at a UNESCO World Heritage Site!

Blenheim Palace Triathlon 2025

Motiv Sports

Kickstart your season with the ever popular Outlaw Half Nottingham Weekend, taking place at the National Water Sports Centre. A sell out event year on year, grab your tickets for the middle distance triathlon which has a delightfully fast and flat course or try the Aquabike option or the traffic free Sprint triathlon. There's a kids race, on site camping, country park adventure activities, and plenty to keep spectators and family entertained before they get the opportunity to cheer you as you run down the famous orange carpet.

Outlaw Half Nottingham Weekend 2025

Wasserman Mass Participation Ltd

Taking place over 3 days, this triathlon festival takes place in beautiful and challenging terrain, and has become a firm favourite in the triathlon community. Join talented and beginner athletes alike in one of Europe's biggest multi-sport weekends.

The Long Course Weekend – Wales

Activity Wales Events

This annual triathlon event is a well-loved event that needs to be added to your event calendar as early a possible. Featuring a pool swim and a fast, flat course, this event is perfect for veteran triathletes and beginners alike.

East Leake 'End of Season' Sprint Triathlon 2024 (Pool Based)

Endorphin Sport

T﻿he UK's most beautiful triathlon will return to Holkham Estate for 2025. Alongside this middle distance triathlon, there’s an aquabike, a gravel triathlon, the ever popular 10k and the children's Future Outlaw run. With an inspiring backdrop, iconic finish line, camping and plenty of activities for the whole family, this is not one to miss out on.

Outlaw Half Holkham Weekend 2025

Outlaw Nottingham, and the original Outlaw is the big one. An award-winning full distance triathlon covering a 2.4mile open water swim, 112mile bike and 26.2mile run! The Outlaw Nottingham Weekend also features an aquabike option, sprint distance aquathlon and kid's run events. All this alongside camping, country park adventure activities and plenty to keep spectators and family entertained before they get the opportunity to cheer you on as you finish on the famous orange carpet.

Outlaw Nottingham Weekend 2025

Try out a triathlon for the first time or finish off your season with a bang. Offering a Sprint and an Olympic race with an indoor pool swim and flat run that almost guarantees a fast time. Hear the crowds cheer as you race towards a new PB.

The Last Tri

Trimax Events

Take on the perfect event to start your multi-sport racing career. The Wilmslow Autumn Triathlon has plenty of different races on offer, ranging from a sprint distance triathlon to a sprint distance aquathlon there will be something for everyone. Come to earn your finisher's medal.

Wilmslow Autumn Triathlon

OP Events

T﻿his September triathlon in the coastal town of Poole promises to be an exciting event for athletes old and new to the sport. Enjoy a sea swim, scenic cycle and heroic beach run, before claiming your bespoke finishers memento. Come along for the incredible views and great atmosphere.

Sandbanks Sprint Triathlon - September

Results Triathlon

Take on this fun mixed team relay event with three others at Torbay Velopark this autumn. With a fast, flat course and pool swim, this is ideal for a range of abilities. Claim your finishers' medal and challenge for a podium finish.

Torbay Triathlon Relay - Autumn

Sportiva Events

T﻿ake on a triathlon like no other with The ROC Scotland. You will tackle the UK's highest mountain, an open water loch swim and challenging cycle trails. Come for a fantastic challenge and to embrace the picturesque highlands scenery.

THE ROC Scotland

Sensation Group

Challenge yourself by taking part in this incredible triathlon festival, with races and events for all ages and experience levels. Offering a flat, traffic-free course and pool swim, this is the perfect opportunity to try something new or improve on your PB.

Torbay Triathlon Autumn

Put your mental and physical abilities to the test as you take on every discipline in this triathlon event set in East Leake. Now celebrating its 21st year running, this is a highly well-loved and well-organised event. This has been a sell out event for over 20 years so make sure to book early to avoid disappointment.Clubs, relay teams, families and Individuals of all abilities are encouraged to take part in this challenge, take home a finisher's medal and a load of memories you'll never forget.

East Leake Pool Sprint Triathlon 2025

Tackle this fantastic triathlon within the stunning grounds of Radley College, just outside of Oxford. The pool-based event is suitable for both experienced triathletes and newcomers alike. Kick off your Easter weekend in style by bringing home a bespoke medal!

Radley Triathlon 2025

Rees Leisure

If you've ever wanted to take part in a triathlon, but didn't know where to start, The First Tri is the event for you. With a great course and a finisher's medal for every competitor, this event is for every level of athlete.

The First Tri 2025

The perfect event for those wanting to give a triathlon a go, the Winchester tri offers three races. The junior, novice and sprint triathlons all consist of a pool swim followed by scenic bike and run legs. Come to try something new and earn your medal.

Winchester Triathlon 2025

Have you got what it takes to conquer all three ROC locations? Including climbs up Snowdon, Scafell Pike and Ben Nevis, these events are not for the faint hearted. This is the UK's freshest and most progressive triathlon series challenge and promises to be an almighty achievement. Earn your exclusive ROC Gold Print Hoodie and serious triathlon kudos.

THE ROC Trilogy 2025

Tackle Snowdon up the toughest path and plunge into the clear waters of Abersoch Bay at THE ROC Wales. Covering 115k with 5,825 of total elevation gain with extraordinary views, this is the ultimate bucket list event!

THE ROC Wales 2025

Liven up your mid-week routine with a sprint triathlon at Cromhall Quarry, where you can expect stunning scenery, a refreshing lake swim and a ride through rolling countryside. Enter individually or in a team and claim your finisher's prize.

SWMA Tri Series Race 1 

Take part in this sprint distance race set in the heart of Swansea, ideal for first timers and elite athletes. Boasting one of the best locations in the UK, this is not one to miss!

Swansea Triathlon 2025

Join Endorphin Sport for their popular Uppingham Pool Sprint Triathlon. This event, designed to be inclusive, features a pool swim with ample spectator viewing spots. The marked course, chip timing, safety crew and medical team make this a fantastic entry event into tri-sport.

Uppingham Pool Sprint Triathlon and Children's Aquathlon 2025

Plunge into this fantastic mid-week triathlon event at the beautiful venue of Cromhall Quarry. The Sprint Tri will see you swim, bike and run through the stunning Gloucestershire countryside. Enjoy the scenery and your finisher's gift.

SWMA Tri Series Race 2 

Explore the stunning Pembrokeshire coast in this fantastic event. Winner of the 220 triathlon awards for best triathlon, the unique atmosphere, closed roads and incredible start and finish lines are what makes this a must-do event. A sell out every year, grab your spot before it's too late!

The Wales Triathlon

Take part in this stunning sprint plus triathlon in Fishguard Bay, Wales. A well organised event, welcoming back regular triathlon athletes and beginners. You'll complete a 950m swim, 30 mile bike and 4 mile run with routes along the gorgeous coastline including a run along the Goodwick Sea Wall.

Fishguard Triathlon

Enjoy the beautiful scenery of Abersoch whilst challenging yourself over Olympic and Sprint distances. For both seasoned athletes and newcomers alike, this event promises a vibrant atmosphere, with a beach bar, live music and post-race celebrations.

ABERSOCH Triathlon 2025

If a scenic triathlon is what you're looking for, then look no further. Swim in the crystal clear waters of Cromhall Lake, bike through the stunning Cotswolds and then soak up the lake views on the run course. You will take home a bespoke medal and finisher tee to celebrate your incredible achievement!

SWMA Wild Boar 70.3 & Olympic Triathlon 2025

Join RunThrough at Darwen Leisure Centre for a sprint or standard triathlon next June to put your spring training to the test. With a fantastic pool swim and scenic bike and run through the market town and surrounding moorland, this promises to be a great day out.

Darwen Tri /Aquathlon/5k/10k - June 2025

RunThrough

Experience the picturesque Gloucestershire countryside around Cromhall Quarry as you swim, bike and run in this mid-week triathlon event. Break up the working week and take home your finisher prize to celebrate the achievement.

SWMA Tri Series Race 3 

Conquer the Chilterns with this fantastic new triathlon event from RunThrough. There will be three distances in both the triathlon and aquabike, providing the perfect opportunity for everyone to get involved. With bespoke medals on offer, this is not one to miss.

Conquer the Chilterns Triathlon

The perfect event for the whole family to enjoy, this sprint triathlon and kids' aquathlon returns to Guildford. With a pool-based swim and gently rolling course, the triathlon is ideal for experienced athletes or beginners! Come along to earn your fantastic finisher's medal.

Guildford Sprint Triathlon and Kids Aquathlon 2025

SWMA Tri Series Race 4

Soak in the scenery of the Yorkshire Dales as you take on this incredible multi-sport, multi-day event. Choose to take on the 2.4 mile swim in Grimwith Reservoir, the 112 mile sportive and marathon for the full Long Course, enter the Half event or enter the swim, cycle or run individually! With a vibrant atmosphere, 5,000 athletes and plenty of spectators, get your moment of glory as you cross the all-important finish line.

The Long Course Weekend - Yorkshire

Liven up your mid-week routine with the last in the series of sprint triathlons at Cromhall Quarry, where you can expect stunning scenery, a refreshing lake swim and a ride through rolling countryside. Enter individually or in a team and claim your finisher's prize.

SWMA Tri Series Race 5

Make the most of the autumn breeze in this short and sweet sprint triathlon in one stunning location. The Salcombe Sprint Triathlon will consist of a 700m sea swim, 18k road cycle and 3k trail run. Expect some stunning views, undulating hills and excellent on-course support.

Salcombe Gin Sprint Triathlon

Let’s Go Velo

Take on a super sprint, sprint or standard triathlon this September at the Olympic venue of Dorney Lake in Windsor. With a flat, entirely traffic-free route, swim, bike and run your way to the finish line to claim your medal and see if you can achieve a new PB.

Eton Dorney Triathlons - September 

VOTWO

P﻿repare yourself for the return of the Dalwish Triathlon. The sea swim, fast bike course and coastal run make this an epic, scenic yet challenging event. With two events, one aimed at newcomers, push yourself to achieve something awesome.

Dawlish Triathlon

This triathlon festival is perfect for those looking to scorch up their courses. There's the choice of a Sprint and Nitro event, both of which are sure to get your adrenaline pumping. With beautiful countryside surroundings too, what's not to love?

Hitchin Triathlon

Burnt Hare

Join OneRace for the One on the River - a fantastic triathlon event in the scenic Thames Valley area. Swim the river, cycle the hilly open roads and run trail paths, all while enjoying views of Henley-on-Thames and the surrounding areas. Enjoy the variety of distances and disciplines.

The One on the River - Henley

OneRace

Get ready to push your limits and feel the thrill of accomplishment at the Aldeburgh Triathlon! Nestled in the heart of the beautiful coastal town of Aldeburgh, our event kicks off right at the historic Moot Hall, amidst the buzz of Market Cross Place. Whether you're a seasoned triathlete or a first-timer, we welcome you to join us for an unforgettable challenge. Dive into the invigorating waters, pedal through picturesque landscapes, and run with the ocean breeze at your back. It's not just a race; it's an experience that will ignite your spirit and test your mettle. Sign up now and let the anticipation begin!

Aldeburgh Triathlon

Aldeburgh Triathlon | Aldeburgh

After another successful year, Newport Sprint & Olympic triathlon will be returning in 2024 for more triathlon triumph. The well marshalled route and secure transition area make this event the ideal safe space for beginners, and the flat run and cycle routes provides real PB potential.

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Triathlon Events in United Kingdom 2024-2025

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