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Triathlons

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.

90 events found
Challenge London 2023
Booked 159 times this week

Sunday, 6 Aug 2023

Challenge London 2023

LocationIndicator

London, Greater London

Participants

olympic, sprint, super sprint

Star4.5

(310 reviews)

FilledTicket£44 – £239
Booking perksGreat atmosphere
Heart
Outlaw Half Holkham Weekend 2023
Booked 86 times this week

Saturday, 8 Jul 2023

Outlaw Half Holkham Weekend 2023

LocationIndicator

Wells-next-the-Sea, Norfolk

Participants

10k, half ironman

Star4.5

(11 reviews)

FilledTicket£10 – £235
Booking perksGreat atmosphereGreat sceneryFlat trail
Heart
Natures Way Foods Chichester Triathlon Series Weekend
Booked 46 times this week

Saturday, 1 Jul 2023

Natures Way Foods Chichester Triathlon Series Weekend

LocationIndicator

Chichester, West Sussex

Participants

olympic, sprint

FilledTicket£15 – £50
Booking perksTrail
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Run Dorney 5k, 10k and Half Marathon - July 2023
Booked 33 times this week

Sunday, 16 Jul 2023

Run Dorney 5k, 10k and Half Marathon - July 2023

LocationIndicator

Windsor, Buckinghamshire

Participants

5k, 10k, half marathon, super sprint, sprint, olympic

Star4.5

(6 reviews)

FilledTicket£23.40 – £30
Booking perksGreat atmosphereFlat road
Heart
Outlaw X Thoresby Park Weekend 2023
Booked 34 times this week

Saturday, 2 Sept 2023

Outlaw X Thoresby Park Weekend 2023

LocationIndicator

Newark, Nottinghamshire

Participants

10k, half ironman

Star4.5

(38 reviews)

FilledTicket£10 – £225
Booking perksGreat atmosphereGreat sceneryFlat trail
Heart
Dorney Triathlon - June
Booked 5 times this week

Saturday, 10 Jun 2023

Dorney Triathlon - June

LocationIndicator

Windsor, Buckinghamshire

Participants

sprint, super sprint, olympic

FilledTicket£60 – £105
Booking perksGreat sceneryFlat road
Heart
Cromhall Evening Tri Series - June
Booked 10 times this week

Wednesday, 14 Jun 2023

Cromhall Evening Tri Series - June

LocationIndicator

Cromhall, South Gloucestershire

Participants

sprint, super sprint

Star5

(6 reviews)

FilledTicket£15 – £35
Booking perksGreat atmosphereFlat
Heart
Try a Tri Coached Triathlon Day

Thursday, 15 Jun 2023

Try a Tri Coached Triathlon Day

LocationIndicator

Cromhall, South Gloucestershire

Participants

10k

Star5

(2 reviews)

FilledTicket£99
Booking perksGreat atmosphere
Heart
Abersoch Triathlon 2023
Booked 3 times this week

Saturday, 17 Jun 2023

Abersoch Triathlon 2023

LocationIndicator

Abersoch, Gwynedd

Participants

olympic, sprint

FilledTicket£5 – £90
Booking perksGreat sceneryFlat
Heart
Wild Boar Middle Distance & Olympic 2023
Booked 8 times this week

Sunday, 18 Jun 2023

Wild Boar Middle Distance & Olympic 2023

LocationIndicator

Wotton-under-Edge, South Gloucestershire

Participants

super sprint, half ironman

FilledTicket£70 – £90
Booking perksGreat sceneryHilly trail
Heart
Sandbanks Sprint Triathlon - June

Sunday, 18 Jun 2023

Sandbanks Sprint Triathlon - June

LocationIndicator

Poole, Dorset

Participants

5k, sprint

FilledTicket£30 – £75
Booking perksFlat road
Heart
The 14th Dartford Bridge Triathlon
Booked 2 times this week

Sunday, 18 Jun 2023

The 14th Dartford Bridge Triathlon

LocationIndicator

Dartford, Kent

Participants

olympic, super sprint, sprint

FilledTicket£26.67 – £67
Booking perks
Heart
Cardiff Triathlon & Duathlon 2023
Booked 4 times this week

Sunday, 25 Jun 2023

Cardiff Triathlon & Duathlon 2023

LocationIndicator

Cardiff, Cardiff

Participants

olympic, sprint, super sprint

Star4.5

(28 reviews)

FilledTicket£37 – £205
Booking perksGreat atmosphereRoad
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Eton Dorney Triathlons - June
Booked 8 times this week

Sunday, 25 Jun 2023

Eton Dorney Triathlons - June

LocationIndicator

Windsor, Buckinghamshire

Participants

super sprint, sprint, olympic

Star4.5

(39 reviews)

FilledTicket£25 – £75
Booking perksGreat atmosphereFlat road
Heart
WCWP Bristol Triathlon Supersprint Treble Series
Booked 1 time this week

Friday, 30 Jun 2023

WCWP Bristol Triathlon Supersprint Treble Series

LocationIndicator

Bradley Stoke, South Gloucestershire

FilledTicket£20 – £60
Booking perksRoad
Heart
Thorpe Park Sprint Triathlon
Booked 12 times this week

Sunday, 2 Jul 2023

Thorpe Park Sprint Triathlon

LocationIndicator

Chertsey, Surrey

Participants

sprint

FilledTicket£25 – £71
Booking perksFlat trail
Heart
The Northumbrian

Sunday, 2 Jul 2023

The Northumbrian

LocationIndicator

Hexham, Northumberland

Participants

ironman, half ironman

FilledTicket£73.34 – £305
Booking perks
Heart
Hitchin Triathlon
Booked 9 times this week

Sunday, 2 Jul 2023

Hitchin Triathlon

LocationIndicator

Hitchin, Hertfordshire

Participants

sprint, super sprint

FilledTicket£20 – £58
Booking perksRoad
Heart
RunThrough Dorney Evening Triathlon - July

Wednesday, 5 Jul 2023

RunThrough Dorney Evening Triathlon - July

LocationIndicator

Dorney, Buckinghamshire

Participants

sprint, super sprint

FilledTicket£55 – £76
Booking perksFlat road
Heart
FixAddiction Triathlon
Booked 1 time this week

Saturday, 8 Jul 2023

FixAddiction Triathlon

LocationIndicator

Windsor, Buckinghamshire

Participants

sprint, super sprint

Star3

(6 reviews)

FilledTicket£60
Booking perksGreat atmosphereFlat
Heart
Salty Sea Dog Triathlon – July
Booked 3 times this week

Saturday, 8 Jul 2023

Salty Sea Dog Triathlon – July

LocationIndicator

Bournemouth, Dorset

Participants

sprint, super sprint

Star5

(35 reviews)

FilledTicket£45 – £55
Booking perksGreat atmosphereFlat road
Heart
The Bridge Children's Triathlon

Sunday, 9 Jul 2023

The Bridge Children's Triathlon

LocationIndicator

Dartford, Kent

FilledTicket£24 – £35
Booking perksFlat
Heart
Guildford Triathlon and Kids Aquathlon
Booked 12 times this week

Sunday, 9 Jul 2023

Guildford Triathlon and Kids Aquathlon

LocationIndicator

Guildford, Surrey

Participants

sprint

FilledTicket£25 – £68
Booking perksFlat road
Heart
Edinburgh Triathlon
Booked 10 times this week

Sunday, 9 Jul 2023

Edinburgh Triathlon

LocationIndicator

Longniddry, East Lothian Council

Participants

sprint

FilledTicket£79.99
Booking perks
Heart
Showing 1 - 24 of 96 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’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 (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. 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 (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 (1.9k, 90k, 21.1k) and the Full Distance / 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.

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