Triathlon Calendar United Kingdom 2026-2027
Monthly updates for United Kingdom
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Explore the best triathlons in United Kingdom for 2026-2027! Our updated list features 234 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
Four person team relay triathlon at Box End Lakes featuring a 350 m swim, 7.7 km bike and 1 km run per athlete. Teams can enter in Olympic mixed, female or open categories and single entries may be allocated to teams on race day.
A two day multisport weekend at National Water Sports Centre with half distance, sprint, aquabike and junior runs plus an event village and grandstand finish.
A sprint triathlon along Swansea waterfront with a 750 m dock swim, three flat city centre bike laps and a 5 km run, on a signed and marshalled non-drafting course.
A 100 km triathlon at Box End Lakes on 23 May 2027 with a 2.2 km swim, 81 km non draft bike and a 20 km off road run. Aquabike and team relay options are available, with camping and free parking on site.
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.
June 2027
A two-day triathlon at Blenheim Palace on June 5-6, 2027 with Sprint and SuperSprint distances, lake swim, closed road bike course and parkland run. Relay and youth options are available and a finish festival welcomes athletes and spectators.
A coastal triathlon around Fishguard with sheltered harbour swims, open-road bike sections and coastal runs. Two distances are offered, including a Middle and a Sprint Plus format.
A seven day endurance event from Fort Augustus to the Thames, featuring a 5 km swim in Loch Ness, five days of cycling and a final 50 km ultra marathon. Organised by WMP Creative with a listed standard entry fee.
Sea-swim triathlon in Weymouth on 6 June 2027 offering sprint and classic distances, chip timing, marshalled bike and run routes, swim safety cover and a dedicated race HQ at Weymouth College.
IRONMAN 70.3 Bolton on June 6, 2027 is a swim, bike and run triathlon in Bolton United Kingdom with a lake swim at Pennington Flash Country Park, a rolling bike through nearby villages and a run around Bolton Town Centre and Queen's Park.
Experience an open water swimming festival at Lochore Meadows Country Park featuring five swim distances and two aquathlons in the fresh waters of Loch Ore.
Multiple discipline event at Druridge Bay Country Park with junior races, open water swims, trail runs and triathlon races including a 2027 European qualifier.
A multi-distance triathlon and duathlon in Llanberis near Yr Wyddfa on 13 June 2027, offering Sprint through Ultra distances, a Season Pass linking a second North Wales event, on-course support, an event village and chip timing.
Organised by the local club at White Oaks Leisure Centre on 13 June 2027, the event offers sprint, standard and aqua bike distances and is BTF sanctioned.
Multi-distance triathlon in Windsor with an open-water Thames swim, cycling past Windsor Castle and a finishing run through Windsor Great Park.
Seaside triathlon in Abersoch with Olympic and Sprint courses, a sea swim, bike laps, and a beach finish with music and a beach bar.
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. Flat, traffic free lakeside courses, live chip timing, finishers receive a medal, merchandise and a snack.