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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.

Outlaw Half Holkham Weekend 2023
Booked 116 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
Blenheim Palace Triathlon 2023
Booked 68 times this week

Saturday, 3 Jun 2023

Blenheim Palace Triathlon 2023

LocationIndicator

Woodstock, Oxfordshire

Participants

sprint, super sprint

Star4.5

(49 reviews)

FilledTicket£41.68 – £205
Booking perksGreat atmosphereGreat sceneryFlat trail
Heart
London Triathlon 2023
Booked 73 times this week

Sunday, 6 Aug 2023

London Triathlon 2023

LocationIndicator

London, Greater London

Participants

olympic, sprint, super sprint

Star4.5

(310 reviews)

FilledTicket£44 – £205
Booking perksGreat atmosphere
Heart
Outlaw Nottingham Weekend 2023
Booked 49 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 41 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
Hart Triathlon Series
Booked 14 times this week

Monday, 1 May 2023

Hart Triathlon Series

LocationIndicator

Fleet, Hampshire

Participants

sprint

FilledTicket£15 – £40
Booking perks
Heart
Outlaw Half Nottingham 2023
Booked 17 times this week

Saturday, 20 May 2023

Outlaw Half Nottingham 2023

LocationIndicator

Holme Pierrepont, Nottinghamshire

Star5

(2 reviews)

FilledTicket£10
Booking perksGreat atmosphereRoad
Heart
Eton Dorney Triathlons - June
Booked 18 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
Natures Way Foods Chichester Triathlon Series Weekend
Booked 17 times this week

Saturday, 1 Jul 2023

Natures Way Foods Chichester Triathlon Series Weekend

LocationIndicator

Chichester, West Sussex

Participants

olympic, sprint

FilledTicket£15 – £60
Booking perksTrail
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RunThrough Thorpe Park Sprint Triathlon
Booked 17 times this week

Sunday, 2 Jul 2023

RunThrough Thorpe Park Sprint Triathlon

LocationIndicator

Chertsey, Surrey

Participants

sprint

FilledTicket£25 – £61
Booking perksFlat trail
Heart
Salty Sea Dog Triathlon – July
Booked 25 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
Salty Sea Dog Triathlon – August
Booked 21 times this week

Saturday, 5 Aug 2023

Salty Sea Dog Triathlon – August

LocationIndicator

Bournemouth, Dorset

Participants

sprint, super sprint

Star4.5

(43 reviews)

FilledTicket£45 – £55
Booking perksGreat atmosphereFlat road
Heart
Outlaw Sprint - Thoresby Park 2023
Booked 18 times this week

Saturday, 2 Sept 2023

Outlaw Sprint - Thoresby Park 2023

LocationIndicator

Newark, Nottinghamshire

Participants

10k, sprint

FilledTicket£28 – £69
Booking perks
Heart
Eton Dorney Triathlons - September
Booked 16 times this week

Sunday, 24 Sept 2023

Eton Dorney Triathlons - September

LocationIndicator

Dorney, Buckinghamshire

Participants

super sprint, sprint, olympic

Star4.5

(93 reviews)

FilledTicket£25 – £75
Booking perksGreat atmosphereFlat road
Heart
The Radley Triathlon
Booked 8 times this week

Friday, 7 Apr 2023

The Radley Triathlon

LocationIndicator

Radley, Oxfordshire

Participants

sprint

FilledTicket£65 – £75
Booking perksFlat
Heart
Torbay Triathlon Spring
Booked 1 time this week

Sunday, 9 Apr 2023

Torbay Triathlon Spring

LocationIndicator

Paignton, Torbay

Participants

5k, sprint, super sprint

Star5

(9 reviews)

FilledTicket£21 – £51
Booking perksGreat atmosphereRoad
Heart
Duston Triathlon
Booked 8 times this week

Sunday, 16 Apr 2023

Duston Triathlon

LocationIndicator

Northampton, Northamptonshire

Participants

super sprint

Star5

(24 reviews)

FilledTicket£45 – £51
Booking perksGreat atmosphereFlat road
Heart
Wilmslow Triathlon
Booked 12 times 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 7 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
Tonbridge Coronation Triathlon

Monday, 1 May 2023

Tonbridge Coronation Triathlon

LocationIndicator

Tonbridge, Kent

Participants

5k, olympic, sprint

FilledTicket£47 – £63
Booking perks
Heart
Winchester Triathlon 2023
Booked 6 times this week

Monday, 1 May 2023

Winchester Triathlon 2023

LocationIndicator

Winchester, Hampshire

Participants

super sprint, sprint

FilledTicket£32.44 – £75
Booking perksHilly road
Heart
Bristol Triathlon Series - Race 1
Booked 3 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
Booked 2 times this week

Saturday, 6 May 2023

The All Nations Triathlon

LocationIndicator

Dorney, Buckinghamshire

Participants

sprint

Star4.5

(12 reviews)

FilledTicket£60
Booking perksGreat atmosphereRoad
Heart
Showing 1 - 24 of 120 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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