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UK Triathlon Events Found

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Triathlons

Triathlons combine swimming, cycling and running into one of the most popular all-round physical challenges. There are a huge variety of types of triathlons to choose from in terms of distances, cycle and run terrain options, and whether the swim is in a pool, in open water (eg lake) or even the sea.

Triathlon distances:
Super Sprint Triathlons: 400m swim; 10km bike; 2.5km run.
Sprint Triathlons: 750m swim; 20km bike; 5km run.
Olympic Triathlons (aka Standard Triathlons): 1500m swim; 40km bike; 10km run.
Half Ironman Triathlons: 1.9km swim; 90km bike; 21.1km run. (This distance is also known as a “70.3” which refers to the total race distance in miles.)
Ironman™ Triathlons: 3.86km (2.4 mile) swim; 180.25km (112 mile) bike; 42.2km (26.2 mile) run. As Ironman™ is a trademark, these are also known as ‘Iron distance’ events.

Find a Race lists more than 450 triathlons every year. So whether you’re new to the sport and looking for your first Super Sprint triathlon or a hardened triathlete looking for a Double Ironman distance event, check out our comprehensive full 2025 - 2026 triathlon list below, or if you know which distance you want to search for use the links above.

Triathlons

🚀Boosted

Sri Chinmoy TRY A TRI beginner's triathlon 2025

Bristol, Avon
03 Aug 25
£20.00
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THE ROC ENGLAND

Ulverston, Cumbria
06 Sep 25
£240.00
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Triathlon Y Bala

Bala, Gwynedd
07 Sep 25
£80.99 - £105.99
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The Brutal Triathlons & Seriously Brutal Duathlons

Caernarfon, Gwynedd
20 Sep 25 - 21 Sep 25
£95.00 - £355.00

2026 Wilmslow Spring Triathlon

Wilmslow, Cheshire East
26 Apr 26
£37.99 - £75.00
5.0

Cheshire Triathlon 2026

Nantwich, Cheshire East
10 May 26
£89.00 - £99.00
4.5

Marlow Triathlon

Marlow, Buckinghamshire
24 May 26
£72.00 - £152.00

Henley Triathlon 2026

Henley-on-Thames, Oxfordshire
31 May 26
£89.00 - £99.00
4.3

Royal Windsor Triathlon

Windsor, Berkshire
14 Jun 26
£87.00 - £192.00

Staffordshire Endurance Festival

Walsall, West Midlands
14 Jun 26
£30.00 - £182.00

Bowood House Triathlon

Calne, Wiltshire
20 Jun 26
£37.00 - £77.00

Mold Triathlon

Mold, Clwyd
05 Jul 26
£30.00 - £57.00

Upton Tri + Duathlon

Worcester, Worcestershire
11 Jul 26
£50.00 - £85.00

Marlow Triathlon

Marlow, Buckinghamshire
19 Jul 26
£72.00 - £152.00

Alderford Triathlon 2026

Whitchurch, Shropshire
06 Sep 26
£99.00 - £119.00
5.0

Cowman Triathlon

Olney, Buckinghamshire
03 Aug 25
£63.00 - £136.50

Salty Sea Dog Duathlons & Triathlons - August

Bournemouth, Bournemouth, Christchurch and Poole
09 Aug 25
£45.00 - £70.00
4.6

London T100 Triathlon 2025

London
09 Aug 25 - 10 Aug 25
£78.00 - £420.00

Belvoir Castle Triathlon - Multi Sport Weekend

Grantham, Lincolnshire
31 Aug 25
£55.00 - £155.00
4.0
Showing 41-55 of 55 results
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