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.
May 2027
Triathlon at Lutterworth Leisure Centre offering super sprint and sprint distances with pool swims, cycling and running; registration closes 18 April 2027.
Coastal to summit multi-discipline event from Abersoch Beach to Snowdon and back covering 115 km with swim, bike, mountain run and beach finish.
Off road duathlons at Dalby Forest on 9 May 2027 with sprint and standard formats, live chip timing, camping options, and finisher medal and refreshments.
A spring open water triathlon at Boundary Water Park in Cheshire with standard and sprint distances, relay teams and an aquabike option.
A chip-timed triathlon in Nantwich featuring an outdoor heated brine pool swim, a 21 km country cycle lap and laps around Barony Park.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Sprint triathlon in Royal Wootton Bassett on 9 May 2027 with a 400 m pool swim, 22 km bike and 5 km run; 2027 profits go to Wiltshire Air Ambulance.
Sprint-distance triathlon in Llanelli with a 750 m open water swim, 26 km bike and 5 km run; includes relay entries and forms part of the Llanelli Multi-Sport Festival.
A run-plus-mountain-bike duathlon in Galloway Forest Park on 9 May 2027 featuring a 10 km run and an 18 km mountain bike on flowing trails.
Sprint triathlon at Hatfield Sports Village with a 400 m pool swim, 20 km bike and 5 km run, including the Herts Club Sprint Championships and non-draft rules.
East Grinstead Triathlon on 9 May 2027 features pool swims, a 26 km bike through nearby villages and town runs, with relay, Try a Tri and aquabike options.
Crowle Triathlon on 9 May 2027 at Axholme Leisure Centre features Sprint, Super Sprint relay teams of 2 or 3, and an Aquabike category; all finishers receive a medal.
Hatch End Harrow Triathlon in London offers pool swims, bike and run stages across adult and junior categories, organised by a local grassroots club.
A two-day SUP, road cycling and trail running event at Fforest Fields offering SUP workshops, chip timing, on-site camping and two distance options.
Multi-discipline event at Hanningfield Reservoir near Chelmsford featuring sprint and standard triathlons, aquabikes and open water swim with live chip timing and free parking.
Conquer the highest peak in Wales through a 36 km multi-activity adventure involving cycling, trekking, and kayaking in the heart of Snowdonia National Park.
Open-water triathlon at Roadford Lake with Middle, Standard and Sprint distances, quiet road bike laps, gravel runs, team relay and lakeside camping.
A try triathlon in Grantown-on-Spey on 16 May 2027 combining a 300 m pool swim, a 16 km bike circuit and a 4.8 km run through Anagach woods. Events for individuals and teams with a junior category to age 18.
Standard distance triathlon at Cotswold Water Park with a 1500 m lake swim, 40 km bike and flat 10 km tarmac run plus an Aquabike option.
TriCheddar offers sprint and super sprint triathlons at Cheddar Gorge on 16 May 2027, with pool swims, signposted bike routes and an out-and-back run on the Strawberry Line.
A club run event at Sevenoaks Leisure Centre with a 400 m pool swim, a 25 km undulating bike through Kent and a run through Knole Park.