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 308 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.
January 2027
Race 1 of a three-event aquathlon at Tewkesbury Leisure Centre with a 400 m pool swim and a 5 km undulating off-road run, accessible facilities and free parking.
February 2027
Duathlon at Dorney Lake with Super Sprint, Sprint and Standard distances on flat road laps, relay options, chip timing and free race photos.
Winter Duathlon Series Round 3 is on 7 February 2027 at Betteshanger Country Park, with pre-booking required, entry fees by bank transfer, free parking with car registration and three start groups.
Multi-discipline duathlon and off-road endurance races at Henley Showground on 7 February 2027, with marked courses, chip timing and on-course support.
Sprint and Super Sprint run, bike, run duathlons at Bramley Farm near Dunham Massey, Altrincham, on flat lanes and roads with parking and on-site food.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
A roughly half a marathon run through London parks and lidos from Hampstead to Brockwell Park with organised swims and a kit van, organised by Above Below.
Multiple timed distances on the historic Goodwood Motor Circuit with free photos, chip timing, finish goodies and an event village.
A winter adventure race in the Cotswolds combining trail running and mountain biking with map and compass navigation, solo or team entries and bike hire available.
A round of the Winter Duathlon Series at Betteshanger Country Park on 28 February 2027 with pre booking, modest entry fees, and recommended start groups by expected finish time.
Trail runs and standard and sprint off road duathlons take place in the forest around Speech House, Gloucestershire.
Race 2 of the Tewkesbury Tri Aquathlon Series at Tewkesbury Leisure Centre features a 400 m pool swim and a 5 km undulating off‑road run, with accessible facilities and free parking.
March 2027
Sprint duathlon at Brunel Quay, Neyland on 7 March 2027 featuring a 5 km run, 21 km bike and 2.5 km run; individual and relay entries, field capped at 200.
Indoor pool swim with poolside transition followed by a seafront run in Littlehampton, offered in two distances with age categories and prizes.
A sprint duathlon at Carlisle Lake District Airport featuring traffic-free runs, a 19.3 km bike on quiet roads, chip timing, prizes and finisher’s medals.
Duathlon at Dorney Lake with Super Sprint, Sprint and Standard distances on a flat, chip timed road course with relay options and free race photos.
Final round of the Winter Duathlon Series and the Daniel Squire Club Championship at Betteshanger Country Park on 14 March 2027, pre-booking required and entry fee applies.
A run, bike, run duathlon around Rivington and the West Pennine Moors featuring trail runs, a 37.2 km road bike loop and on-site parking.
Run bike run event at Hillingdon Cycle Circuit on 14 March 2027 with traffic free laps and races for adults and youth.
Donut Duathlon at Torbay Velopark on 14 March 2027 offers a traffic free run, bike, run course with races for children and adults and donuts for every finisher.
Duathlon in Grasmere combining runs on village and lakeside trails with cycling legs to Elterwater or Hawkshead and Coniston, organised by Wild Deer Events.