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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.

106 events found
Ironman 70.3 Weymouth

Sunday, 17 Sept 2023

Ironman 70.3 Weymouth

LocationIndicator

Weymouth, Dorset

Participants

half ironman

Star4.5

(6 reviews)

FilledTicketPrice TBC
Great atmosphereGreat sceneryFlat
Heart
East Leake Triathlon

Sunday, 26 Mar 2023

East Leake Triathlon

LocationIndicator

East Leake, Nottinghamshire

FilledTicket£20 – £55
Heart
Bristol Triathlon Series - Race 2

Friday, 26 May 2023

Bristol Triathlon Series - Race 2

LocationIndicator

Frampton Cotterell, South Gloucestershire

Participants

sprint

FilledTicket£35
Flat road
Heart
West Bay Triathlon

Sunday, 18 Jun 2023

West Bay Triathlon

LocationIndicator

West Bay, Dorset

Participants

olympic, sprint, super sprint

Star4

(13 reviews)

FilledTicketPrice TBC
Great atmosphereGreat sceneryFlat road
Heart
Outlaw Half Woburn Weekend 2023

Saturday, 24 Jun 2023

Outlaw Half Woburn Weekend 2023

LocationIndicator

Milton Keynes, Central Bedfordshire

Participants

10k

FilledTicketPrice TBC
Flat
Heart
Bristol Triathlon Series - Race 3

Friday, 30 Jun 2023

Bristol Triathlon Series - Race 3

LocationIndicator

Frampton Cotterell, South Gloucestershire

Participants

super sprint

FilledTicket£35
Flat road
Heart
Bristol Triathlon Series - Race 4

Friday, 28 Jul 2023

Bristol Triathlon Series - Race 4

LocationIndicator

Frampton Cotterell, South Gloucestershire

Participants

sprint

FilledTicket£35
Flat road
Heart
255 Triathlon Festival of Endurance

Sunday, 30 Jul 2023

255 Triathlon Festival of Endurance

LocationIndicator

Chichester, West Sussex

Participants

5k, ultramarathon, sprint, ironman, half ironman

FilledTicketPrice TBC
Heart
Bristol Triathlon Series - Race 5

Friday, 25 Aug 2023

Bristol Triathlon Series - Race 5

LocationIndicator

Frampton Cotterell, South Gloucestershire

Participants

sprint

FilledTicket£35
Flat road
Heart
Outlaw Half Bowood Weekend 2023

Sunday, 10 Sept 2023

Outlaw Half Bowood Weekend 2023

LocationIndicator

Derry Hill, Wiltshire

Participants

10k

FilledTicketPrice TBC
Flat
Heart
Showing 97 - 106 of 106 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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