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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.

Nearby Triathlons

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All Triathlons
85 events found
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  • 7AUG

    The London Triathlon

    Triathlon London
    56.9 mi • 32.0 mi • 16.0 mi • 8.0 mi
    £62.99 – £164
    (157)
  • 4JUL

    The Festival of Endurance at Hever Castle

    Multi-Sport Hever Castle
    140.6 mi • 76.9 mi • 75.6 mi • 70.2 mi • 38.5 mi • 37.0 mi • 26.2 mi • 15.4 mi • 13.1 mi • 7.4 mi • 1.2 mi
    (1)
  • 25SEP

    Hever Castle Triathlon and Sport Festival

    Multi-Sport Hever
    70.2 mi • 35.0 mi • 32.0 mi • 30.3 mi • 25.8 mi • 18.6 mi • 16.0 mi • 15.2 mi • 13.1 mi • 12.9 mi • 10.7 mi • 7.1 mi • 6.6 mi • 6.2 mi • 3.7 mi • 3.6 mi • 3.4 mi • 3.1 mi • 1.6 mi • 1.0 mi
    £30 – £270C-19 Plan
    (4)
  • 11SEP

    Blenheim Palace Triathlon

    Triathlon Blenheim Palace Grounds
    16.1 mi • 10.3 mi • 10.2 mi
    £108.50 – £111.50C-19 Plan
    (18)
  • 19SEP

    Ironman 70.3 Weymouth

    Half Ironman Weymouth
    70.2 mi
    £260 – £330C-19 Plan
    (6)
  • 25SEP

    The SportPursuit Slateman Triathlon, Duathlon & Swim Events

    Multi-Sport Llanberis
    70.8 mi • 56.1 mi • 42.3 mi • 39.5 mi • 17.6 mi • 16.6 mi • 2.4 mi • 1.2 mi • 0.6 mi
    £26 – £165
    (1)
  • 28AUG

    The UK Emergency Services Games

    Multi-Sport Milton Keynes
    70.2 mi • 32.0 mi • 17.2 mi • 6.2 mi • 3.1 mi
    £15 – £125
  • 18SEP

    TRI Challenge Individual & Team Triathlon

    Sprint Windsor
    15.8 mi • 12.7 mi
    £25 – £45
  • 5SEP

    Ironman Wales

    Ironman Wales
    140.4 mi
    (4)
  • 19SEP

    Cheshire Triathlon

    Triathlon Nantwich
    16.5 mi • 14.7 mi
    £59.95 – £64.95C-19 Plan
    (5)
  • 5SEP

    Woodhall Sprint Triathlon

    Sprint Woodhall Spa
    18.3 mi
    £48 – £56C-19 Plan
    (2)
  • 12SEP

    Torbay Triathlon Autumn

    Triathlon Paignton
    12.7 mi • 6.4 mi • 5.1 mi • 2.8 mi • 1.4 mi
    £17 – £41C-19 Plan
  • 26SEP

    Dawlish Triathlon

    Triathlon Dawlish Warren
    18.5 mi • 6.7 mi
    £34 – £49
  • 11SEP

    Wild Tri & Wild Tri Extreme

    Super Sprint Okehampton
    28.6 mi • 14.3 mi
    £30 – £84
  • 12SEP

    Fleetwood Triathlon

    Super Sprint Fleetwood
    10.8 mi • 8.3 mi • 6.6 mi • 5.0 mi • 3.3 mi • 1.6 mi
    £40 – £43
    (2)
  • 11SEP

    Superfeet Sandman Triathlon & Duathlon

    Multi-Sport Llanfairpwllgwyngyll
    70.8 mi • 61.4 mi • 46.9 mi • 43.4 mi • 20.3 mi • 18.0 mi
  • 31JUL

    The Snowman Triathlon

    Multi-Sport Betws-y-Coed
    1469.5 mi • 70.8 mi • 52.8 mi • 50.6 mi • 23.9 mi • 22.2 mi • 2.4 mi • 1.2 mi • 0.6 mi
    (1)
  • 11JUL

    Pitsford Standard Triathlon, Duathlon, Aquathlon

    Multi-Sport Northampton
    938.3 mi • 37.4 mi • 32.1 mi
  • 30AUG

    The Pulsin Westonbirt Sprint Triathlon

    Triathlon Tetbury
    18.3 mi
    £53 – £65C-19 Plan
  • 30AUG

    Winchester Triathlon

    Sprint Winchester
    17.0 mi • 8.5 mi
    £44.99 – £49.99C-19 Plan
  • 18SEP

    The Ben Nevis Braveheart Triathlon

    Super Sprint Fort William
    70.2 mi
    £170 – £200
  • 13JUN

    Pitsford Sprint Triathlon, Duathlon, Aquabike, Aquathlon

    Multi-Sport Northampton
    19.0 mi • 16.4 mi • 13.3 mi • 3.6 mi
    (2)
  • 29AUG

    West Lancashire Summer Triathlon

    Triathlon Ormskirk
    14.9 mi
    £44 – £55C-19 Plan
    (1)
  • 4JUL

    The Fugitive

    Multi-Sport Marlow
    68.7 mi • 66.8 mi • 30.1 mi • 18.8 mi • 1.9 mi • 0.9 mi
    (4)
Showing 1 - 24 of 85 events

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


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