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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.
Sunday, 6 Aug 2023
Challenge London 2023
London, Greater London
olympic, sprint, super sprint
(310 reviews)
Saturday, 8 Jul 2023
Outlaw Half Holkham Weekend 2023
Wells-next-the-Sea, Norfolk
10k, half ironman
(11 reviews)
Saturday, 1 Jul 2023
Natures Way Foods Chichester Triathlon Series Weekend
Chichester, West Sussex
olympic, sprint
Sunday, 16 Jul 2023
Run Dorney 5k, 10k and Half Marathon - July 2023
Windsor, Buckinghamshire
5k, 10k, half marathon, super sprint, sprint, olympic
(6 reviews)
Saturday, 2 Sept 2023
Outlaw X Thoresby Park Weekend 2023
Newark, Nottinghamshire
10k, half ironman
(38 reviews)
Saturday, 10 Jun 2023
Dorney Triathlon - June
Windsor, Buckinghamshire
sprint, super sprint, olympic
Wednesday, 14 Jun 2023
Cromhall Evening Tri Series - June
Cromhall, South Gloucestershire
sprint, super sprint
(6 reviews)
Thursday, 15 Jun 2023
Try a Tri Coached Triathlon Day
Cromhall, South Gloucestershire
10k
(2 reviews)
Saturday, 17 Jun 2023
Abersoch Triathlon 2023
Abersoch, Gwynedd
olympic, sprint
Sunday, 18 Jun 2023
Wild Boar Middle Distance & Olympic 2023
Wotton-under-Edge, South Gloucestershire
super sprint, half ironman
Sunday, 18 Jun 2023
Sandbanks Sprint Triathlon - June
Poole, Dorset
5k, sprint
Sunday, 18 Jun 2023
The 14th Dartford Bridge Triathlon
Dartford, Kent
olympic, super sprint, sprint
Sunday, 25 Jun 2023
Cardiff Triathlon & Duathlon 2023
Cardiff, Cardiff
olympic, sprint, super sprint
(28 reviews)
Sunday, 25 Jun 2023
Eton Dorney Triathlons - June
Windsor, Buckinghamshire
super sprint, sprint, olympic
(39 reviews)
Friday, 30 Jun 2023
WCWP Bristol Triathlon Supersprint Treble Series
Bradley Stoke, South Gloucestershire
Sunday, 2 Jul 2023
Thorpe Park Sprint Triathlon
Chertsey, Surrey
sprint
Sunday, 2 Jul 2023
The Northumbrian
Hexham, Northumberland
ironman, half ironman
Sunday, 2 Jul 2023
Hitchin Triathlon
Hitchin, Hertfordshire
sprint, super sprint
Wednesday, 5 Jul 2023
RunThrough Dorney Evening Triathlon - July
Dorney, Buckinghamshire
sprint, super sprint
Saturday, 8 Jul 2023
FixAddiction Triathlon
Windsor, Buckinghamshire
sprint, super sprint
(6 reviews)
Saturday, 8 Jul 2023
Salty Sea Dog Triathlon – July
Bournemouth, Dorset
sprint, super sprint
(35 reviews)
Sunday, 9 Jul 2023
Guildford Triathlon and Kids Aquathlon
Guildford, Surrey
sprint
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.