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 283 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.
September 2027
Box End Lakes triathlon on 19 September 2027 offering Sprint, Standard, Odyssey Middle Distance, aquabike and relay options with clear open water swims and marked courses.
Wilmslow Autumn Triathlon on 19 September 2027 features Sprint and Double Sprint formats plus Aquabike, Aquathlon, Duathlon and relay at Wilmslow Leisure Centre.
IRONMAN Wales in Tenby, United Kingdom features a sunrise swim on North Beach, a coastal bike including the Saundersfoot climb, and a town run lined with spectators.
A Nantwich triathlon featuring a heated brine pool swim, a 21 km countryside bike lap and a lapped park run, with sprint, super sprint, relay and charity CRUK wave options.
Sprint triathlon at Jubilee Park Woodhall Spa on 19 September 2027 with a 400 m pool swim, 24 km bike and 5 km run; chip timing and race medals.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Triathlon at Dawlish Warren with a sea swim, 2 or 3 bike laps on a sheltered circuit and a run along the coast path. Entries from £53 to £75.
A sprint triathlon from North Sands Salcombe with a 700m swim, 17.5km cycle and 3km trail run; the swim may be removed for safety.
Triathlon at Gyllyngvase Beach with calm open-water swims, coastal bike and run routes around Pendennis Point, offered in Super Sprint and Sprint distances.
Triathlon at Grafham Water on 25 September 2027 with swim laps, flat bike and 5 km run loops plus aquabike and relay options.
A multisport weekend at Hever Castle, Kent with triathlon, duathlon, aquabike, aquathlon, swim and run races, junior events and a festival village.
Multisport event in the Cuilcagh Lakelands Geopark combining cycling, trail running and kayaking with long and short course options.
A two part biathlon with a run at Evesham Velo Park and a swim at Evesham Leisure Centre, organised by Evesham Swimming Club with age classes and points scoring.
A beach-to-forest triathlon on Ynys Môn with sea swims, mixed road and trail legs, multiple distances including a 70.3 option and live chip timing.
Crowle Triathlon on 26 September 2027 at Axholme Leisure Centre features sprint, super sprint, relay and aqua bike categories with medals for all finishers.
October 2027
A weekend of trail events around Kielder Reservoir with marathon, half, 10K, gravel duathlon and junior races, chip timed and served by shuttle buses.
Multi-race event at Oulton Park on 3 October 2027 with sprint, standard and middle categories plus an afternoon Fast 5km; entries close 30 September 2027.
Pool triathlon in Stratford-upon-Avon on 3 October 2027 with 200m or 400m swims, an 18km bike lap and 2.5km or 5km runs.
Pool based triathlon in Lydney offering Sprint and Olympic distances, chip timing, medals and a scenic but hilly bike route with a flat looped run.
Pool swims of 1 km or 2 km followed by a hilly 10 km run to Devils Chimney and back at Cheltenham Lido, open to adults 18 and over.
Duathlon at Thruxton Race Circuit with standard and sprint formats on a wide smooth tarmac circuit, spectator facilities, prebooked motorhome parking and volunteer marshalling.