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Triathlons

Triathlon is a multidiscipline sport, combining swimming, cycling and running in sequence.There are five official distances: Sprint Distance (750m swim, 20km bike, 5km bike); Olympic (1.5km swim, 40km bike, 10km swim); ITU Long (3km swim, 80km bike, 20km run); Half/Middle-Distance/70.3/Half-Ironman (1.9km swim, 90km bike, 21.1km run); Full/Ironman (3.8km swim, 180km bike, 42.2km run). There are other unofficial distances, such as super-sprint triathlons or ultra-triathlons. Multisports have been growing in popularity in the UK over recent years, particularly triathlons. The UK now has over 1,000 triathlon events each year with over 200,000 participants. Some triathlons take place in cities, with the swim section in pools or manmade lakes, and the cycle and run elements through cities and past landmarks. Alternatively, some triathlons require open-water swimming in the sea, and take the cycling and running sections off-road onto trails and difficult terrains. There are multisport variations of triathlons such as duathlon, aquathlon, and aquabike, which focus on two of the disciplines but not all three.
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  • 6AUG

    The London Triathlon

    Triathlon London
    497.1 mi • 56.9 mi • 32.0 mi • 16.0 mi • 8.0 mi
    £62.99 – £205.50C-19 Plan
    (157)
    People triathlon the The London Triathlon
  • 7MAY

    The All Nations Triathlon

    Sprint Windsor
    15.8 mi
    £55C-19 PlanPartnered
    (2)
    People triathlon the The All Nations Triathlon
  • 14MAY

    The ROC - Spring

    Super Sprint Abersoch
    78.6 mi
    £180 – £195C-19 Plan
    People triathlon the The ROC - Spring
  • 15MAY

    Exmouth Triathlon

    Triathlon Exmouth
    15.8 mi • 8.0 mi • 5.4 mi • 3.5 mi • 2.3 mi • 1.1 mi
    £18 – £45C-19 PlanPartnered
    People triathlon the Exmouth Triathlon
  • 15MAY

    Bridport Triathlon

    Multi-Sport Bridport
    19.9 mi • 18.9 mi • 18.3 mi • 17.1 mi • 3.5 mi • 2.8 mi • 1.7 mi
    C-19 Plan
    People duathlon the Bridport Triathlon
  • 22MAY

    The Huntsman Tri

    Multi-Sport Blashford
    70.2 mi • 57.1 mi • 27.4 mi • 26.7 mi • 23.9 mi
    £49.75 – £170C-19 Plan
    People triathlon the The Huntsman Tri
  • 22MAY

    The Marlow Classic

    Multi-Sport Marlow
    68.7 mi • 66.8 mi • 54.4 mi • 32.3 mi • 30.1 mi • 23.9 mi • 21.4 mi • 18.8 mi • 15.7 mi • 1.9 mi • 0.9 mi • 0.5 mi
    C-19 Plan
    (14)
    People triathlon the The Marlow Classic
  • 30MAY

    Swansea Triathlon

    Sprint Swansea
    16.0 mi
    £60 – £100C-19 Plan
    People triathlon the Swansea Triathlon
  • 31MAY

    Enduroman Arch to Arc

    Triathlon London
    290.2 mi
    £3,000
  • 5JUN

    Honiton Triathlon

    Sprint Honiton
    15.8 mi
    £38 – £43C-19 Plan
    People triathlon the Honiton Triathlon
  • 11JUN

    Pitsford Triathlon, Duathlon, Aquathlon, & Aquabike

    Multi-Sport Brixworth
    37.4 mi • 32.1 mi • 19.0 mi • 16.4 mi • 13.3 mi • 7.1 mi • 3.6 mi
    C-19 PlanPartnered
    People triathlon the Pitsford Triathlon, Duathlon, Aquathlon, & Aquabike
  • 18JUN

    Salty Sea Dog Triathlon - June

    Triathlon Bournemouth
    18.1 mi • 9.1 mi
    C-19 Plan
    People triathlon the Salty Sea Dog Triathlon - June
  • 18JUN

    Robinsons Abersoch Triathlon

    Multi-Sport Abersoch
    32.0 mi • 16.0 mi • 0.6 mi
    £5 – £95C-19 Plan
    People triathlon the Robinsons Abersoch Triathlon
  • 18JUN

    Cholmondeley Castle Triathlon

    Multi-Sport Malpas
    73.9 mi • 36.7 mi • 34.5 mi • 32.8 mi • 28.3 mi • 26.2 mi • 18.3 mi • 17.2 mi • 16.4 mi • 14.1 mi • 13.1 mi • 10.4 mi • 7.1 mi • 6.8 mi • 6.2 mi • 5.5 mi • 3.7 mi • 3.6 mi • 3.4 mi • 3.1 mi • 1.6 mi • 1.0 mi
    £23 – £203C-19 Plan
    (2)
    People triathlon the Cholmondeley Castle Triathlon
  • 2JUL

    The Festival of Endurance at Hever Castle

    Multi-Sport Hever Castle
    140.4 mi • 111.8 mi • 76.9 mi • 75.5 mi • 70.2 mi • 55.9 mi • 50.0 mi • 38.5 mi • 37.0 mi • 26.2 mi • 15.4 mi • 13.1 mi • 7.7 mi • 6.2 mi • 2.4 mi • 1.2 mi
    £30 – £338C-19 Plan
    (1)
    People running the The Festival of Endurance at Hever Castle
  • 3JUL

    The Original Swanage Triathlon Festival

    Multi-Sport Swanage
    62.1 mi • 49.0 mi • 30.8 mi • 17.9 mi • 3.6 mi • 3.1 mi • 1.6 mi
    £25 – £126
    People triathlon the The Original Swanage Triathlon Festival
  • 3JUL

    Outlaw Half – Holkham

    Half Ironman Holkham Estate
    70.2 mi
    £195 – £225C-19 Plan
    (11)
    People triathlon the Outlaw Half – Holkham
  • 3JUL

    The Fugitive

    Multi-Sport Marlow
    68.7 mi • 66.8 mi • 54.4 mi • 32.3 mi • 30.1 mi • 23.9 mi • 21.4 mi • 18.8 mi • 15.7 mi • 1.9 mi • 0.9 mi • 0.5 mi
    £15 – £110C-19 PlanPartnered
    (4)
    People triathlon the The Fugitive
  • 9JUL

    FixAddiction Triathlon

    Sprint Windsor
    15.8 mi
    £55C-19 PlanPartnered
    People triathlon the FixAddiction Triathlon
  • 9JUL

    Salty Sea Dog Triathlons – July

    Triathlon Bournemouth
    18.1 mi • 9.1 mi
    C-19 Plan
    People triathlon the Salty Sea Dog Triathlons – July
  • 10JUL

    Guildford Triathlon

    Sprint Guildford
    17.7 mi • 4.9 mi • 3.4 mi • 1.2 mi
    £21 – £65C-19 PlanPartnered
    (16)
    People triathlon the Guildford Triathlon
  • 17JUL

    The Swashbuckler Middle Distance Triathlon

    Multi-Sport Beaulieu
    70.8 mi • 57.1 mi
    £73.25 – £173.50C-19 Plan
    (1)
    People triathlon the The Swashbuckler Middle Distance Triathlon
  • 23JUL

    Castle Howard Triathlon

    Multi-Sport Castle Howard
    70.2 mi • 38.5 mi • 35.1 mi • 34.1 mi • 28.9 mi • 26.2 mi • 19.0 mi • 17.9 mi • 17.0 mi • 14.8 mi • 13.1 mi • 9.8 mi • 7.5 mi • 6.8 mi • 6.2 mi • 5.5 mi • 4.2 mi • 3.7 mi • 3.6 mi • 3.4 mi • 3.1 mi • 1.6 mi • 1.0 mi
    £23 – £203C-19 Plan
    People triathlon the Castle Howard Triathlon
  • 24JUL

    Triathlon Team Relays Bedford

    Super Sprint Bedford
    16.0 mi
    £162 – £177C-19 PlanPartnered
    People triathlon the Triathlon Team Relays Bedford
Showing 1 - 24 of 129 events
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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 and London Triathlon host athletes of all levels of experience with big crowds building a buzzing atmosphere.

What you need to know about Triathlons

The Super-Sprint distance (400m,10k, 2.5k) and Sprint distance (750m, 20k, 5k) triathlons are great for beginners looking to explore multi-sport. These events can be attempted without much prior training, however, if you want to be competitive you should practice your transitions as they can make a big difference to your time. Our 8 week sprint triathlon training plan will get you up to speed. If you are well prepared you could expect to finish a Super-Sprint in under an hour and the Sprint in under 90 minutes.

Olympic (1.5k, 40k, 10k) distance triathlons are the standard distance for international competition. To be competitive here, you’ll need to take your training seriously. We recommend following our 12 week middle distance triathlon training plan (designed for Half Ironman preparation) to get you in shape. If you want to compete in a big name event, the ITU World Triathlon event in Leeds is one of the most popular in the UK, and you’ll get to see some of the worlds best competing for the World Series title. If you can finish one of these in under 3 hours, kudos to you.

The final two distances are the Middle Distance / Half Ironman (1.9k, 90k, 21.1k) and the Full Distance / Ironman (3.8k, 180k, 42.2k). Finishing these events is an achievement in itself. IRONMAN UK and the Outlaw Triathlon are among the UK’s favourites. 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.

Kit

To compete in a triathlon you’ll need the right gear. We’ve written a blog post on 33 essential items to pack for a triathlon, which highlights what you really need and why. Don’t forget your swim cap!

Triathlons by Location