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.
August 2027
Triathlon around Bristol Harbour with swim in Cumberland Basin, closed road bike and run, Sprint and Standard options plus Aquabike and relay entries.
Multi-distance triathlon at Emberton Country Park offering middle, standard and sprint races plus aquabike, aquathlon and bike-run options.
Pool-based triathlon at King Edward's School, Birmingham with grass cycle and run circuits, four distances and relay options for ages 14 and up.
A multi-distance triathlon festival in St Neots on 7 Aug 2027 with sprint to full Odyssey races, relays, and a 12 hour run alongside family-friendly festival attractions.
Experience a one day multi sport adventure in the Lake District featuring a mountain trek, off road cycling through Grizedale Forest, and kayaking on Coniston Water.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Triathlon at Dorney Lake offering Sprint, Standard and Super Sprint distances with aquabike and relay options on a flat, chip timed course.
Multi-distance triathlon at Hartlepool Marina on 8 Aug 2027 with Sprint and Standard options, aquabike, relays and an open water swim on flat coastal courses.
Conquer the highest peak in Wales through a 36 km multi-activity journey involving cycling, trekking to the summit of Snowdon, and kayaking across Llyn Padarn in a single day.
Triathlon at Bassenthwaite Sailing Club near Keswick with sprint and standard routes featuring open-water swims and undulating tarmac bike and run stages.
A full-distance triathlon in Leeds with a lake swim, hilly bike and a run centred on Roundhay Park, and the only IRONMAN held in England.
Bedford Triathlon in Bedford town centre on 15 August 2027 offers Olympic and Sprint races with river swims, country bike routes and multi lap riverside runs.
Triathlon at Blithfield Reservoir on 15 August 2027 with a 1.5 km two lap swim, two lap bike with 355 m climb, and a two lap mixed trail and road run.
Sprint triathlon in Barry, Wales on August 15, 2027 with a 750 m swim, a mapped bike course and a 5 km run; entries open soon.
Triathlon at Oundle School with swims in a 50m indoor pool, open country road cycling and runs around the school grounds.
Sprint-distance triathlon at Thorpe Park: a 750 m lake swim, 20 km bike and 5 km run with chip timing, medal, free park admission and support for Macmillan.
Midweek triathlon at Dorney Lake with Super Sprint, Sprint, Standard, aquabike and relay options on a flat lake course with chip timing and wetsuit hire available.
Multi-distance triathlon weekend in London featuring the T100 100 km race and Olympic distance events, freshwater swim with mandatory wetsuits, flat bike and run, and relay teams.
A gravel triathlon in Lochgoilhead combining a 1.8 km loch swim, a 50 km gravel ride with about 2,000 m ascent, and a 25 km mountain run.
SPRINT Superhero Tri is a short multisport challenge with a 150 m swim, 3 km bike and 1 km push/run. Entries can be solo, relay, or pulling a Superhero; everyone on course must be registered and receives a medal, T shirt and Super Kit Bag.