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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...

112 events found
Triathlon Llandudno

Sunday, Sep 25, 2022

Triathlon Llandudno

Llandudno, Conwy Principal Area

super sprint

£89.99 – £100.99
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Dawlish Triathlon
Booked 1 time this week

Sunday, Sep 25, 2022

Dawlish Triathlon

Dawlish Warren, Devon

sprint, super sprint

Star3.5

(1 reviews)

£40 – £49
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Craggy Island Triathlon

Saturday, Oct 1, 2022

Craggy Island Triathlon

Balliemore, Argyll and Bute Council

super sprint

£20 – £61
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Torbay Triathlon Autumn

Sunday, Oct 9, 2022

Torbay Triathlon Autumn

Paignton, Torbay

sprint, super sprint

£19 – £51
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Harlech Triathlon and Duathlon

Sunday, Mar 26, 2023

Harlech Triathlon and Duathlon

Harlech, Gwynedd

sprint

Star5

(3 reviews)

£49.99 – £66.99
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East Leake Triathlon

Sunday, Mar 26, 2023

East Leake Triathlon

East Leake, Nottinghamshire

£14.67 – £36
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East Leake 'End of Season' Triathlon 2023

Sunday, Sep 24, 2023

East Leake 'End of Season' Triathlon 2023

East Leake, Nottinghamshire

sprint

£30 – £36
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Cromhall Evening Tri Series - June
Booked 3 times this week

Wednesday, Jun 8, 2022

Cromhall Evening Tri Series - June

Cromhall, South Gloucestershire

sprint, super sprint

£20 – £45
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West Bay Triathlon
Booked 9 times this week

Sunday, Jun 19, 2022

West Bay Triathlon

West Bay, Dorset

olympic, sprint, super sprint

Star3

(1 reviews)

£40 – £44
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Sandbanks Sprint Triathlon - June

Sunday, Jun 19, 2022

Sandbanks Sprint Triathlon - June

Poole, Dorset

sprint

£65 – £85
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Hitchin Triathlon (Sprint & Nitro)
Booked 6 times this week

Sunday, Jul 3, 2022

Hitchin Triathlon (Sprint & Nitro)

Hitchin, Hertfordshire

sprint, super sprint

£45 – £50
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FixAddiction Triathlon

Saturday, Jul 9, 2022

FixAddiction Triathlon

Windsor, Buckinghamshire

sprint

Star2.5

(1 reviews)

£50 – £60
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Locko Park Sprint Triathlon & Aquabike

Sunday, Jul 10, 2022

Locko Park Sprint Triathlon & Aquabike

Nr. Spondon, Derbyshire

super sprint

£32 – £85
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Cromhall Evening Tri Series - July
Booked 2 times this week

Wednesday, Jul 13, 2022

Cromhall Evening Tri Series - July

Cromhall, South Gloucestershire

super sprint

£20 – £45
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Gosfield Lake Triathlon & Multisport
Booked 4 times this week

Sunday, Jul 17, 2022

Gosfield Lake Triathlon & Multisport

Gosfield, Essex

sprint, olympic

Star4.5

(4 reviews)

£33 – £62
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Hitchin Tri Nitro Series & Race 1

Wednesday, Jul 20, 2022

Hitchin Tri Nitro Series & Race 1

Hitchin, Hertfordshire

super sprint

£20 – £50
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255 Triathlon

Sunday, Jul 31, 2022

255 Triathlon

Chichester, West Sussex

sprint

£360 – £405
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Hitchin Tri Nitro Series - Race Two

Wednesday, Aug 3, 2022

Hitchin Tri Nitro Series - Race Two

Hitchin, Hertfordshire

super sprint

£20
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Cromhall Evening Tri Series - August

Wednesday, Aug 10, 2022

Cromhall Evening Tri Series - August

Cromhall, South Gloucestershire

sprint

£20 – £45
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Bedford Triathlon

Sunday, Aug 14, 2022

Bedford Triathlon

Bedford, Bedford

olympic

£30 – £70
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Hitchin Tri Nitro Series - Race Three

Friday, Aug 19, 2022

Hitchin Tri Nitro Series - Race Three

Hitchin, Hertfordshire

super sprint

£20
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Blithfield Sprint Triathlon & Aquabike
Booked 2 times this week

Sunday, Aug 21, 2022

Blithfield Sprint Triathlon & Aquabike

Abbots Bromley, Staffordshire

super sprint

£56 – £75
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Blithfield Olympic Triathlon & Aquabike

Sunday, Aug 21, 2022

Blithfield Olympic Triathlon & Aquabike

Abbots Bromley, Staffordshire

super sprint

£32.50 – £85
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THE ROC Summer Championships

Saturday, Sep 3, 2022

THE ROC Summer Championships

Abersoch, Gwynedd

£200 – £215
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Showing 49 - 72 of 112 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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