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 274 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
Seaside triathlon in Abersoch with Olympic and Sprint courses, a sea swim, bike laps, and a beach finish with music and a beach bar.
Triathlon at The Mere Ellesmere on 19 June 2027 featuring open water swim, countryside bike, closed road run with multiple distances and relay options.
Lakesman Triathlons returns to Keswick on 20 June 2027 with half and full distances. Swim in Derwentwater, cycle into the western Lake District and run past Skiddaw to finish at Keswick Rugby Club.
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 triathlon and aquabike at Broad Haven featuring a sea swim, coastal run and a 400 competitor field limit.
Three-distance triathlon at The Mere, Ellesmere on 20 June 2027 featuring open-water swim, scenic countryside bike and lakeside run.
A two-day multisport festival at Cholmondeley Castle in Cheshire featuring triathlon, duathlon, aquabike, aquathlon, swims and runs across a wide range of distances.
Trail runs at Kielder Waterside Park offering 48km and 28km distances with UTMB Index status, mandatory kit requirements and checkpoint cut offs.
Coastal triathlon and duathlon in Llandudno with sea swims by the pier, closed-road cycling on Marine Drive and sprint and standard distances.
Triathlon festival in Swanage with multiple distances, open water swims in Swanage Bay, hilly bike routes including Kingston Hill and runs on Ballard Down Ridge.
July 2027
Multisport weekend at Holkham Hall featuring a middle distance triathlon, aquabike, gravel sprint, 10k and junior races with on site camping.
A five-distance triathlon at Hitchin Outdoor Pool with pool swims, closed roads cycling and a flat run finishing at Butts Close.
Open-water triathlons at Derwent Reservoir with sprint and standard distances, aquabike options, live chip timing and on-site parking.
Multi discipline event in Upton upon Severn with open water swims in the River Severn, country road bike laps, mixed terrain runs, camping and enhanced hydration support.
A two day multisport weekend at Cockshott Point on Lake Windermere featuring triathlon, duathlon and aquathlon races across novice, sprint and standard distances, with live chip timing and British Triathlon membership or race pass required.
A coastal triathlon in Southend-on-Sea offering sprint, standard, aquabike, relay and duathlon options with chip timing, water safety cover and a marked course. The event includes marshals, a secure transition area and a bespoke medal.
A multi-discipline event in Winchester featuring a 20 km bike, 2 km kayak and 5 km run along the Itchen Canal, open to individuals or relay teams.
Multi distance triathlon events on the South Downs coast with sea swims, cycling on fully closed roads and runs along the Eastbourne promenade.
A coastal IRONMAN 70.3 in Swansea Bay on July 11, 2027, featuring a swim from Prince of Wales Dock, a bike route along the coastline and a run through the city waterfront.
Multisport weekend at Belvoir Castle on 17 and 18 July 2027 offering triathlon, duathlon, swim and run across 3,000 acres with junior races and camping.