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 235 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.
September 2026
A multi-format triathlon at Wombourne Leisure Centre on 06 Sep 2026 offering sprint, relay, aquabike and aquathon options. Distances include a 400 m swim, 20 km bike and 5 km run; youth entrants must be 15.
A seaside triathlon based at De La Warr Pavilion in Bexhill, featuring sea swim loops, countryside cycling and a pan flat 5 km promenade run. Multiple distance options are offered and all finishers receive a medal.
Triathlon y Bala on 6 September 2026 features lake swims in Llyn Tegid and multiple distances, with the Standard race hosting national and age group championships.
A multisport finale at Dorney Lake near Windsor with triathlon, duathlon, aquabike, aquathlon and open water swims. Courses are marked and marshalled, with chip timing, finisher medals and basic on-site facilities.
A long established sprint triathlon in Newbury, Berkshire with a 300 m pool swim, a 22 km open road cycle and a 5 km canal run. Entries must be made in advance and close on 26 August 2026.
Brighton & Hove Triathlon and Multisport Festival on Sunday 6 September 2026 offers children's TriStars races, super sprint, sprint and standard triathlon distances plus mixed team relays on a traffic-free seafront route from Hove Lawns.
A national standard distance triathlon at Knockburn Loch on 6 September 2026 with a 1.5 km swim, 42 km bike and 10 km run across open water, quiet country roads and mixed trails. Minimum age 17.
Pool swim followed by a run at Kirkintilloch Leisure Centre with age-group heats, female and open categories, and timed results.
Manchester Triathlon Club holds an aquathlon at Sale Water Park on 08 Sep 2026 with adult and youth races across a five event series. Distances include an 800 m swim with a 5 km run and a 400 m swim with a 2.5 km run for youths.
A multi-sport festival at Saundersfoot Harbour on 11 September 2026 featuring swim events and sprint race options with entry prices from £40 to £190. Organised by Activity Wales Events.
A weekend SUP, road cycling and trail running event at Ullswater Lake with standard and long distances and Saturday SUP lessons for participants.
Sundowner Triathlon at Allerthorpe Lakeland Park on 12 September 2026 offers race formats from Sprint to 70.3 with on-course medical and mechanical support and spectator areas.
A community duathlon at Nettleden Lodge near Berkhamsted with a 6 km run, 24 km cycle and another 6 km run. Individual and relay entries are accepted and all funds raised are donated to three charities.
A two day triathlon at Crossmichael Marina on 12 and 13 September 2026 offering a novice event and an Olympic distance race with relay options, open water swims, lake and road bike routes around Loch Ken, and marshalled courses.
A five-race sprint triathlon series at The Lake, Cromhall Quarry in South Gloucestershire. Each event features a 750m swim, an 18km bike and a 5km run with chip timing and points toward overall male and female titles.
A multisport coast to coast across the Scottish Highlands combining road and off road cycling, a mountain trek and a final 1 mile kayak. Options to complete it in one day or over two days while following fully waymarked routes.
A multi-discipline event on 13 September 2026 in FY7 6HF offering triathlon, duathlon, aquathlon, aquabike and youth categories with varied entry fees and closing dates.
Triathlon at West Cliff Gardens with sea swims from the blue flag beach, bike routes toward Ringwood and sprint and standard distance options.
An IRONMAN triathlon in Tenby, Wales with a sunrise swim on North Beach, a hilly coastal bike route and a town run lined by large numbers of spectators.