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.
August 2026
A muddy mini triathlon on 29 August 2026 with a 60 yard bog swim, 2 mile cross country cycle and 1 mile run. Competitors start three minutes apart and entry is £15 with age, gender and fancy dress prizes.
Multi-distance triathlon series and a 10K out-and-back run on the Isle of Skye, featuring an open-water swim in Staffin Bay, chip timing, water safety cover, and published age categories and entry fees.
A multi-distance triathlon at Wimbleball Lake on 30 August 2026 featuring a lake swim, laps on rolling local roads and a 10.5K run lap; formats range from sprint and aquathlon options to an iron distance with GPS tracking.
Experience a triathlon at an iconic Olympic venue featuring a calm open water swim and a flat traffic free course. Choose from Super Sprint Standard Aquabike or relay options with chip timing and themed medals for all finishers.
Triathlon races at Dorney Lake include super sprint, sprint and standard distances plus aquabike and relay options. The event uses a clear lake and flat bike and run course, is draft illegal and is chip timed.
A community duathlon on Hampstead Heath combining swims across the ponds and short runs, held on 30 August 2026. Individuals and teams of three to five can enter, and some proceeds support local breast cancer rehabilitation programmes.
An open water triathlon in Stromness on 30 August 2026 offering sprint and standard distances with a deep water start, open road bike course and a 2.5 km town run loop; team entries are welcome and the event is not chip timed.
A pool swim of 400 m, an undulating 16.5 km cycle on open roads and a two-lap 5 km run around Arc Leisure Centre, Matlock. Entry details note a £20 fee and prizes across age and novice categories.
September 2026
Midweek multisport events at Capernwray Dive Centre offering triathlon, aquathlon, AquaBike and 500/1000/1500 m open-water swims in a flooded quarry near Carnforth.
An off road mountain run then a long west coast road ride from Kinlochewe including the closed Bealach Na Bà climb and 3000m of elevation.
A multisport meeting at Lake 62 in the Cotswolds with lake swims, road cycling and lake path runs, offering distances from a 1.5 km swim to a full standard triathlon plus family activities.
Multi-distance triathlon at Moyles Court School with a swim at Ellingham Waterski Lake, bike through the New Forest and a run on quiet country roads, plus an event village.
A beach triathlon at Perranporth on 6 September 2026 offering Super Sprint and Olympic distances with mandatory wetsuits. The race is part of the Cornish Tri Series and includes junior events plus volunteer-based discounts.
A super sprint triathlon at Lake 62 combining lake swims, road cycling and a lakeside run, offered as team relays or solo entries. Team places are limited and a small number of individual slots are available.
A multi-discipline event in Glenridding on 6 September 2026 with a 1.5 km Lake Ullswater swim, a 59 km bike including Kirkstone Pass, and a 15 km off-road fell run around Helvellyn.
A multi-discipline event on 06 September 2026 combining a 25m pool swim, a bike route through Salcey Forest and an out-and-back run. Multiple distances, relay, aquabike and beginner categories are available, organised by the enDuRo team.
A team relay triathlon in Aldeburgh on 06 Sep 2026 featuring a sea swim, a 22 km bike course and a 5 km off road run with 100 places available.
Bridge Setember 2nd Triathlon in Dartford on 6 September 2026 features a lake swim followed by bike and run stages, with sprint and shorter GOTRi distance options and multiple entry categories.
A community aquathlon at Letchworth Outdoor Pool combining a 400 m pool swim and a 5 km run with junior distances and relay options. Chip timed age group competition, inclusive entries and a 350 participant limit.
A standard-distance sea swim triathlon at Gullane Beach on 06 Sep 2026, offering full individual, three-person relay, and new Swim-Bike and Bike-Run options with sea-side bike and run courses.