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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.

76 events found
Outlaw Half Nottingham 2023
Booked 67 times this week

Saturday, 20 May 2023

Outlaw Half Nottingham 2023

LocationIndicator

Holme Pierrepont, Nottinghamshire

Star5

(1 reviews)

FilledTicket£10 – £225
Booking perksGreat atmosphereRoad
Heart
Outlaw Half Holkham Weekend 2023
Booked 71 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 – £225
Booking perksGreat atmosphereGreat sceneryFlat trail
Heart
London Triathlon 2023
Booked 43 times this week

Saturday, 5 Aug 2023

London Triathlon 2023

LocationIndicator

London, Greater London

Participants

olympic, sprint, super sprint

FilledTicket£44 – £205
Booking perks
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East Leake Triathlon
Booked 23 times this week

Sunday, 26 Mar 2023

East Leake Triathlon

LocationIndicator

East Leake, Nottinghamshire

FilledTicket£20 – £50
Booking perks
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Blenheim Palace Triathlon 2023
Booked 36 times this week

Saturday, 3 Jun 2023

Blenheim Palace Triathlon 2023

LocationIndicator

Woodstock, Oxfordshire

Participants

sprint, super sprint

FilledTicket£41.68 – £205
Booking perksGreat sceneryFlat trail
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Outlaw Nottingham Weekend 2023
Booked 33 times this week

Saturday, 29 Jul 2023

Outlaw Nottingham Weekend 2023

LocationIndicator

Holme Pierrepont, Nottinghamshire

Participants

5k, olympic, medium (2–5km)

Star4.5

(49 reviews)

FilledTicket£10 – £325
Booking perksGreat atmosphereRoad
Heart
Outlaw X Thoresby Park Weekend 2023
Booked 32 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
Harlech Triathlon and Duathlon

Sunday, 26 Mar 2023

Harlech Triathlon and Duathlon

LocationIndicator

Harlech, Gwynedd

Participants

sprint

Star5

(3 reviews)

FilledTicket£49.99 – £66.99
Booking perksGreat atmosphereGreat sceneryHilly trail
Heart
Roade Sprint Triathlon
Booked 1 time this week

Sunday, 26 Mar 2023

Roade Sprint Triathlon

LocationIndicator

Roade, Northamptonshire

Participants

sprint, super sprint

Star3.5

(5 reviews)

FilledTicket£38 – £52
Booking perksGreat atmosphereRoad
Heart
The Radley Triathlon
Booked 2 times this week

Friday, 7 Apr 2023

The Radley Triathlon

LocationIndicator

Radley, Oxfordshire

Participants

sprint

FilledTicket£45 – £50
Booking perksFlat
Heart
Wilmslow Triathlon
Booked 1 time this week

Sunday, 23 Apr 2023

Wilmslow Triathlon

LocationIndicator

Wilmslow, Cheshire East

Participants

sprint, super sprint

Star4.5

(53 reviews)

FilledTicket£19.70 – £70
Booking perksGreat atmosphereFlat road
Heart
Ringwood Triathlon

Sunday, 23 Apr 2023

Ringwood Triathlon

LocationIndicator

Ringwood, Hampshire

FilledTicket£70 – £95
Booking perksRoad
Heart
The First Tri
Booked 5 times this week

Sunday, 30 Apr 2023

The First Tri

LocationIndicator

Lydney, Gloucestershire

Participants

sprint, olympic

Star3.5

(15 reviews)

FilledTicket£45 – £60
Booking perksGreat atmosphereRoad
Heart
Winchester Triathlon 2023
Booked 1 time this week

Monday, 1 May 2023

Winchester Triathlon 2023

LocationIndicator

Winchester, Hampshire

Participants

super sprint, sprint

FilledTicket£32.44 – £53.75
Booking perksHilly road
Heart
Bristol Triathlon Series - Race 1
Booked 4 times this week

Friday, 5 May 2023

Bristol Triathlon Series - Race 1

LocationIndicator

Frampton Cotterell, South Gloucestershire

Participants

sprint

FilledTicket£35
Booking perksFlat road
Heart
The All Nations Triathlon

Saturday, 6 May 2023

The All Nations Triathlon

LocationIndicator

Dorney, Buckinghamshire

Participants

sprint

Star4.5

(12 reviews)

FilledTicket£60
Booking perksGreat atmosphereRoad
Heart
Cromhall Evening Tri Series - May
Booked 1 time this week

Wednesday, 10 May 2023

Cromhall Evening Tri Series - May

LocationIndicator

Cromhall, South Gloucestershire

Participants

sprint, super sprint

Star4.5

(10 reviews)

FilledTicket£15 – £35
Booking perksGreat atmosphereFlat trail
Heart
Weston Park Triathlon and Duathlon

Sunday, 14 May 2023

Weston Park Triathlon and Duathlon

LocationIndicator

Weston-under-Lizard, Staffordshire

Participants

super sprint

Star4.5

(15 reviews)

FilledTicket£24 – £79.99
Booking perksGreat atmosphereGreat sceneryFlat trail
Heart
Dorney Triathlon - May
Booked 2 times this week

Sunday, 21 May 2023

Dorney Triathlon - May

LocationIndicator

Dorney, Buckinghamshire

Participants

super sprint, sprint

FilledTicket£60 – £105
Booking perksGreat sceneryFlat road
Heart
Bristol Triathlon Series - Race 2
Booked 2 times this week

Friday, 26 May 2023

Bristol Triathlon Series - Race 2

LocationIndicator

Frampton Cotterell, South Gloucestershire

Participants

sprint

FilledTicket£35
Booking perksFlat road
Heart
Swansea Triathlon, Swim & 5k
Booked 1 time this week

Saturday, 27 May 2023

Swansea Triathlon, Swim & 5k

LocationIndicator

Swansea, Swansea

Participants

5k, sprint, medium (2–5km), short (0–2km)

FilledTicket£20 – £110
Booking perksFlat road
Heart
RunThrough Dorney Evening Triathlon - May

Wednesday, 31 May 2023

RunThrough Dorney Evening Triathlon - May

LocationIndicator

Dorney, Buckinghamshire

Participants

sprint, super sprint

FilledTicket£55 – £76
Booking perksFlat road
Heart
Slateman Triathlon & Duathlon 2023

Saturday, 10 Jun 2023

Slateman Triathlon & Duathlon 2023

LocationIndicator

Llanberis, Gwynedd

Participants

olympic, sprint, half ironman, super sprint, short (0–2km), medium (2–5km)

Star5

(4 reviews)

FilledTicket£27.33 – £199
Booking perksGreat atmosphereGreat sceneryHilly trail
Heart
Challenge Wales

Saturday, 10 Jun 2023

Challenge Wales

LocationIndicator

Fishguard, Pembrokeshire

Participants

half ironman, sprint

FilledTicket£199 – £399
Booking perksRoad
Heart
Showing 1 - 24 of 76 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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