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Triathlons

By far the most popular multidisciplinary sport, a triathlon combines swimming, cycling and running in sequence - with five officially recognised distances and plenty more for the fun of it. The five official distances are: Sprint (750m swim, 20km bike, 5km run), Olympic (1.5km swim, 40km bike, 10km run); 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). ‘Unofficial’ distances include Super-Sprint or Mini Triathlons (400m swim, a 10km bike, 2.5km run) or Ultra Triathlons (generally referring to all triathlon events with a distance that is a multiple of the Ironman Triathlon). So, whether it’s your very first tri or your 50th, there are incredible events for all levels running up and down the whole country. Check them out below...

118 events found
London Triathlon
Booked 68 times this week

Saturday, Aug 6, 2022

LocationIndicator

London, Greater London

Participants

olympic, sprint

Star4.5

(157 reviews)

FilledTicket£43.70 – £205
Booking perksGreat atmosphereGreat sceneryRoad
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Blenheim Palace Triathlon
Booked 50 times this week

Saturday, May 28, 2022

LocationIndicator

Blenheim Palace Grounds, Oxfordshire

Participants

sprint, super sprint

Star5

(18 reviews)

FilledTicket£68.40 – £205
Booking perksGreat atmosphereGreat sceneryFlat trail
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Winchester Triathlon 2023

Monday, May 1, 2023

LocationIndicator

Winchester, Hampshire

Participants

super sprint, sprint

FilledTicket£32.44 – £53.75
Booking perksHilly road
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The SportPursuit Slateman10 Triathlon & Duathlon

Saturday, Jun 11, 2022

LocationIndicator

Llanberis, Gwynedd

Participants

olympic, sprint, half ironman, super sprint, medium (2–5km)

Star5

(1 reviews)

FilledTicket£26 – £179.99
Booking perksGreat atmosphereGreat sceneryHilly trail
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Eastbourne Triathlon

Saturday, Jun 11, 2022

LocationIndicator

Eastbourne

Participants

sprint

FilledTicket£15 – £126
Booking perksGreat sceneryFlat
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Adventure Championships Triathlon & Duathlon

Saturday, Jun 11, 2022

LocationIndicator

Wales

Participants

sprint, super sprint

FilledTicket£162.99 – £436.99
Booking perksGreat sceneryTrail
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Bristol Triathlon
Booked 19 times this week

Sunday, Jun 12, 2022

LocationIndicator

Bristol, Bristol City

Participants

sprint

FilledTicket£89 – £105
Booking perks
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Eton Dorney Triathlons
Booked 3 times this week

Sunday, Jun 26, 2022

LocationIndicator

Windsor, Buckinghamshire

Participants

super sprint, sprint, olympic

FilledTicket£50 – £90
Booking perksFlat road
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Ironbourne Triathlons and Aquabikes

Sunday, Jul 10, 2022

LocationIndicator

Eastbourne

Participants

ironman, half ironman

FilledTicket£100 – £356
Booking perksGreat scenery
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The Snowman Triathlon & Duathlon
Booked 1 time this week

Saturday, Jul 30, 2022

LocationIndicator

Betws-y-Coed, Conwy

Participants

half ironman, sprint, super sprint

Star4.5

(1 reviews)

FilledTicket£61.95 – £178.99
Booking perksGreat atmosphereGreat sceneryTrail
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Belvoir Castle Triathlon

Sunday, Sep 4, 2022

LocationIndicator

Grantham, Leicestershire

Participants

olympic, sprint, super sprint

FilledTicket£14 – £130
Booking perksGreat scenery
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Superfeet Sandman Triathlon & Duathlon

Saturday, Sep 10, 2022

LocationIndicator

Llanfairpwllgwyngyll, Isle of Anglesey

Participants

super sprint, sprint, half ironman, olympic

FilledTicket£70.99 – £184.99
Booking perksGreat scenery
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Brighton & Hove Triathlon

Saturday, Sep 17, 2022

LocationIndicator

Hove, Brighton and Hove

Participants

super sprint, sprint

FilledTicket£20 – £156
Booking perksGreat scenery
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Eton Dorney Triathlons
Booked 5 times this week

Sunday, Sep 25, 2022

LocationIndicator

Windsor

Participants

super sprint, sprint, olympic

Star4

(4 reviews)

FilledTicket£50 – £90
Booking perksGreat atmosphereFlat road
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RunThrough Goodwood Duathlon - July 2023

Sunday, Jul 2, 2023

LocationIndicator

Chichester, West Sussex

Participants

sprint, olympic

FilledTicket£39 – £50
Booking perks
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RunThrough Goodwood Duathlon - September 2023

Sunday, Sep 3, 2023

LocationIndicator

Chichester, West Sussex

Participants

sprint, olympic

FilledTicket£39 – £50
Booking perks
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Salty Sea Dog Triathlon – June
Booked 4 times this week

Saturday, Jun 4, 2022

LocationIndicator

Bournemouth, Dorset

Participants

super sprint

FilledTicket£45 – £58.50
Booking perksFlat road
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Staunton Harold Triathlon & Children's Aquathlons
Booked 2 times this week

Sunday, Jun 12, 2022

LocationIndicator

Ashby-de-la-Zouch, Leicestershire

Participants

sprint, super sprint

FilledTicket£14 – £77
Booking perksGreat scenery
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Dartmouth Triathlon

Sunday, Jun 12, 2022

LocationIndicator

Dartmouth, Devon

Participants

sprint, super sprint

FilledTicket£42 – £50
Booking perksFlat road
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Dartmouth Open Water Swim

Sunday, Jun 12, 2022

LocationIndicator

Blackpool, Devon

Participants

sprint, super sprint

Star4.5

(30 reviews)

FilledTicket£27 – £39
Booking perksGreat atmosphereGreat sceneryFlat
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Abersoch Triathlon & 1k Beach Sprint

Saturday, Jun 18, 2022

LocationIndicator

Abersoch, Gwynedd

Participants

olympic, sprint

FilledTicket£5 – £95
Booking perksGreat sceneryFlat
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Allerthorpe Sprint & Supersprint Triathlon

Sunday, Jun 19, 2022

LocationIndicator

Allerthorpe, East Riding of Yorkshire

Participants

sprint, super sprint

FilledTicket£40 – £56
Booking perks
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Wild Boar Middle Distance & Olympic
Booked 2 times this week

Sunday, Jun 19, 2022

LocationIndicator

Wotton-under-Edge, South Gloucestershire

Participants

olympic, half ironman

FilledTicket£55 – £70
Booking perksGreat sceneryHilly trail
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WMD - Weymouth Triathlon

Sunday, Jun 26, 2022

LocationIndicator

Weymouth, Dorset

Participants

half ironman, olympic, sprint

Star4.5

(2 reviews)

FilledTicket£55 – £155
Booking perksGreat atmosphereFlat
HeartOutline
Showing 1 - 24 of 118 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!

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