Olympic Triathlons in United Kingdom 2026-2027

The Olympic Distance, or Standard Distance, Triathlon is a multisport event consisting of a 1.5k (0.9 mile) swim, 40k (24.9 mile) bike, and 10k (6.2 mile) run. The Olympic Triahtlon is the most popular distance in the UK. It was first introduced as an Olympic sport at the Sydney Olympics in 2000, and has grown in popularity ever since. In the UK, the sport rose to even greater prominence after the success of the Brownlee brothers winning Gold and Bronze at the London Olympics 2012. There are a range of Olympic triathlon events on offer in the UK. Some are big city events, such as the London Triathlon or World Triathlon Leeds, which take you past historic landmarks and have huge crowds of supporters. Other events are more scenic and rural, making the most of Britain's natural beauty, such as the popular Blenheim Triathlon. These events often offer shorter distance races as well so that beginners or family members can get involved.

10events found
Dorney Lake Triathlon July 2026

12

Sun, Jul 12, 2026

Windsor, GB • Swim 0.4km - Swim 1500m

4.9(11)
The Felixstowe Triathlon 2026

19

Sun, Jul 19, 2026

Felixstowe, GB • Run 3km - Swim 1500m

4.7(65)
Dorney Lake Triathlon 26th July 2026

26

Sun, Jul 26, 2026

Windsor, GB • Swim 0.4km - Swim 1500m

4.5(6)
Votwo Eton Dorney Triathlons - September

20

Sun, Sep 20, 2026

Windsor, GB • Swim 0.45km - Bike 40km

4.7(125)
Dorney Lake Triathlon September 2026

26

Sat, Sep 26, 2026

Windsor, GB • Swim 0.4km - Swim 1500m

4.7(23)
Marlow Triathlon July 2026

19

Sun, Jul 19, 2026

Marlow, GB • Swim 0.75km - Bike 86km

The One on the Lake - Dorney Lake Triathlon

6

Sun, Sep 6, 2026

Windsor, GB • Swim 0.4km - Bike 40km

4.8
One on the River - Henley Triathlon

20

Sun, Sep 20, 2026

Henley-on-Thames, GB • Swim 0.75km - Bike 78.5km

4.7
The Last Tri Lydney

4

Sun, Oct 4, 2026

Lydney, GB • Run 5km - Swim 750m

4.3(80)
The One on the River - Henley - July

26

Sun, Jul 26, 2026

Henley-on-Thames, GB • Swim 0.75km - Bike 78.5km

Showing 1 - 10 of 10 events