Triathlon Calendar United Kingdom 2026-2027
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in United Kingdom for 2026-2027! Our updated list features 227 exciting races across the country. Find your next race in United Kingdom below and join the running community at these great events! Search for a location or view races near London, Birmingham, Glasgow, Liverpool, Scotland or Wales.
May 2027
Open-water triathlon at Roadford Lake with Middle, Standard and Sprint distances, quiet road bike laps, gravel runs, team relay and lakeside camping.
A try triathlon in Grantown-on-Spey on 16 May 2027 combining a 300 m pool swim, a 16 km bike circuit and a 4.8 km run through Anagach woods. Events for individuals and teams with a junior category to age 18.
Standard distance triathlon at Cotswold Water Park with a 1500 m lake swim, 40 km bike and flat 10 km tarmac run plus an Aquabike option.
A sprint and super sprint triathlon in Cheddar Gorge featuring pool swims, a Gorge climb on the bike and an out-and-back run on the Strawberry Line.
Club organised event in Sevenoaks with a 400m pool swim, 25 km undulating bike through Kent countryside, and a run through Knole Park past Knole House.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Multi-sport event at Waterside Lodge, Southport offering sprint and standard triathlon, duathlon, aquabike and aquathlon with open water swims and managed coastal bike routes.
Team relay triathlon at Box End Lakes with three team categories, a 350 m swim, 7.7 km bike and 1 km run; single entries can be assigned to teams.
A multisport weekend at the National Water Sports Centre with sprint, middle-distance and junior races, an event village, grandstand finish and on-site camping.
Pool-based triathlon at Bellahouston Park on 22 May 2027 with four distances, traffic free bike and run courses plus relay and kids events.
A two day multisport festival in Aireville Park, Skipton featuring junior and adult triathlon events, two cycling sportives and a family closed road loop.
Sprint triathlon in Swansea city centre with a 750 m swim, 20 km bike (three laps) and 5 km run on a flat, largely closed and marshalled waterfront course.
A Metric Centurion 100 km triathlon at Box End Lakes on 23 May 2027 featuring a 2.2 km swim, 81 km bike and 20 km offroad run with aquabike and relay options.
Triathlon at Box End Lakes on 23 May 2027 offering Sprint, Standard and Centurion distances. Options include aquabike, two to three person relays, non-draft multi-lap courses and on-site camping.
Triathlon at Marazion Beach with swim, flat bike loops and a fast sea front run; distances from Super Sprint to 70.3 plus an Aquabike option.
Marlow Triathlon on 30 May 2027 at Higginson Park features open water River Thames swims, cycling through the Chilterns and riverside runs, with medals and chip timing.
A sprint triathlon at Westonbirt House on 31 May 2027 featuring a 400 m pool swim, 23 km bike route past the Arboretum and a 5 km traffic-free run.
June 2027
A two-day triathlon at Blenheim Palace on June 5-6 2027 with a lake swim, closed-road bike and scenic run through the palace parkland.
Triathlon in Fishguard, Pembrokeshire with a sheltered harbour swim, open-road cycling and coastal run across sprint, Olympic and middle distances.
A freshwater swim festival at Loch Ore on 05 Jun 2027 offering five triathlon style swim distances and two TS sanctioned aquathlons.
Seven day Monster Triathlon, 6 to 12 June 2027 in Fort Augustus, Scotland, with a 5 km Loch Ness swim, five days of cycling and a 50 km Thames ultra marathon.