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.
June 2027
Sprint triathlon and duathlon at Rother Valley Country Park on 20 June 2027 with traffic free, flat routes, live chip timing and a finisher medal.
Standard-distance coastal triathlon at Broad Haven with 1.5 km swim, 42 km bike and 10 km run; Aquabike and relay options, field capped at 400.
Three triathlon distances at The Mere, Ellesmere on 20 June 2027, with open water swim, country road bike and lakeside tarmac run.
Multi-distance triathlon at Rutland Water with swims in Whitwell Creek, a closed road bike course and a run across the Rutland Water dam.
The Bridge Triathlon in Dartford offers multiple race formats with open water swim, bike and run courses, free parking and a range of standard to GO TRI distances.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
A multisport weekend at Cholmondeley Castle in Cheshire offering triathlon, duathlon, aquabike, aquathlon, open water swims and running events for juniors and adults.
A weekend of triathlon, aquabike and UTMB Index trail runs around Kielder Water and Forest in Northumberland on 26 and 27 June 2027.
Pool based triathlon at Caldicot Leisure Centre on 26 June 2027 with an indoor swim, traffic free grass cycle circuit, multiple distances, relay and kids races.
A six-lap Eliminator Swimrun in Aberdyfi mixing running and open water swims around the Dyfi Biosphere, scheduled for 26 June 2027.
Multisport races at Lake 62 in Ashton Keynes include triathlon, duathlon, aquabike, aquathlon, a new 1.5 km swim and a free family fun run.
Coastal triathlon and duathlon in Llandudno on 27 June 2027 with sea swims by the pier, closed-road cycling on Marine Drive and a crowd-lined promenade run.
Triathlon festival in Swanage with open water swims, hilly bike routes and ridge runs across the Purbeck Downs.
Multi-sport weekend at Ullswater offering Sprint, Standard and Middle distances across triathlon, duathlon, aquabike and aquathlon at Park Foot Holiday Park.
Swimrun races of 5k, 10k and 21k at Grafham Water on 27 June 2027 with solo and two-person team entries, marked courses and mandatory safety kit.
Five evening multi sport events in Portsmouth combining running, cycling and kayak or SUP legs around Langstone Harbour, scored as a five event series with an overall leaderboard.
July 2027
Multisport weekend at Holkham Hall with a half triathlon, aquabike, gravel sprint, 10 km and junior races plus on site camping and an event village.
Five-distance triathlon at Hitchin Outdoor Pool and Butts Close, from children's Nano races to the Olympic distance, with timing, t-shirt and finisher medal included.
Multisport races at Derwent Reservoir on 4 July 2027 offering sprint and standard triathlon, duathlon and Aquabike distances in calm open water and scenic countryside.
A summer aquathlon at The Wave, Littlehampton combining a 25m pool swim with a flat run course; options are 800m swim with 10k or 400m swim with 5k.
Triathlon at Promenade Park Maldon on 4 July 2027 offering middle, standard and sprint distances plus aquabike and relay options.