UK Triathlon Events Found
View all ↓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
Cholmondeley Castle Triathlon & Multisport
Malpas, Cheshire, Cheshire EastOffer
10% OFF
The Northumbrian Full & Half Iron-Distance Triathlon
Hexham, NorthumberlandTHE ROC SCOTLAND
Kinlochleven, ArgyllTorbay Triathlon Relay
Torbay VeloparkTorbay Triathlon Spring
Torbay Velopark, Torbay Leisure Centre Penwill Way, Paignton TQ4 5JREirias Park Triathlon & Duathlon
Colwyn Bay, Conwy Principal AreaChirk Triathlon & Aquathlon
Wrexham, Chirk, Wrexham Principal AreaSwim Bike Run
Kent, PortageAdventure Triple Challenge
Penrith, CumbriaATW St Neots Triathlon - Race 1
Riverside Park, Regatta Meadow, St Neots, Cambridgeshire, PE19 7AB2025 Wilmslow Spring Triathlon
Wilmslow, Cheshire East2025 Tonbridge Triathlon
Tonbridge, KentTavistock Triathlon
Mount Kelly, TavistockThe All Nations Triathlon
Windsor, BerkshireTHE ROC WALES
Pwllheli, GwyneddMoran’s Junior Aquathlon & Triathlon in association with Pied Piper
Cheltenham, GloucestershireCheshire Triathlon 2025
Nantwich, Cheshire EastATW Box End Mixed Team Relay (incorporating British Triathlon Mixed Team Relay Championships)
Box End Lakes,Box End Rd, Bedford MK43 8RNATW Box End Triathlon
Box End Lakes,Box End Rd, Bedford MK43 8RNATW Centurion 100KM Triathlon Box End
Box End Lakes,Box End Rd, Bedford MK43 8RNRoadford Lake Triathlon
Roadford Lake, Broadwoodwidger, Lifton, PL16 0RLSwim Bike Run
Herne Bay, KentLough Cutra Castle Triathlon and Multisport
Gaillimh, County GalwayOffer
10% OFF
Dorney Lake Draft-Legal Triathlon - incorporating Sprint Triathlon 2026 World Championships Qualifier
Dorney Lake, Off Court Lane, Windsor, Berks, SL4 6QPDorney Evening Triathlon
Windsor, BuckinghamshireUppingham Pool Triathlon
Oakham, LeicestershireHenley Triathlon 2025
Henley-on-Thames, OxfordshireStaffordshire Middle Distance Triathlon & Running Festival
WalsallATW Grafman Middle Distance Triathlon
Grafham Water Visitor Centre, Marlow Park, Grafham, Huntingdon, Cambs, PE28 0BHPendle Pool Triathlon powered by Fort Vale
West Craven Sports Centre, Kelbrook Rd, Barnoldswick BB18 5TBDorney Triathlon- June 2025
Windsor, BerkshireChâteau de Chantilly Triathlon & Duathlon
Chantilly, OiseOffer
10% OFF