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 280 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
Multi-race aquathlon at Guildford Lido with swims in a 50 m outdoor pool and runs around Stoke Park, held in June, July and September 2026.
An 80 mile off road duathlon from Kinlochewe with an 18 mile mountain run and a 62 mile bike including a closed road climb over Bealach Na Bà.
A multisport meeting at Lake 62 near Ashton Keynes offering triathlon, duathlon, aquabike, aquathlon, a new 1.5 km swim and a 1.5 km family fun run.
Two aquathlon races at Colwick Country Park on 5 September 2026 featuring open water swims and flat road runs, with online entry and event facilities.
A relaxed community triathlon in South London with open water swim, stationary bike and dockside run where participants choose their own distances.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Monthly Swim Bike Run at Torbay Velopark with pool swims, velopark bike laps and grass and gravel runs for children and adults.
Triathlon at Moyles Court School with swims in Ellingham Waterski Lake, multiple race distances and an event village for spectators.
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.
Super sprint team and individual triathlon at Lake 62, Cotswolds on 6 September 2026 featuring swim, cycle and run legs with limited entries and Triathlon England permit.
A Lake District triathlon with a 1 mile Ullswater swim, 38 mile bike over Kirkstone Pass and a 9 mile fell run to Helvellyn summit.
A multi-distance triathlon on 6 September 2026 at Northampton High School with pool swims, one-lap bike courses and out-and-back runs through local villages and Salcey Forest.
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.
Small low entry triathlon at the Bridge Development in Dartford offering multiple multi lap race formats including a 1500m Stranded event and shorter GOTri and sprint races.
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 long standing sea triathlon at Gullane Beach featuring a 1500 m swim, 42 km bike and 10 km run set on East Lothian roads and trails.
Sprint triathlon at Wombourne Leisure Centre with 400 m swim, 20 km bike and 5 km run plus aquabike and aquathon options; youth must be 15 by year end.
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 features lake starts at Llyn Tegid and three distances; the 2026 Standard hosts national and age-group championships and supports Tom Harrison House.
Multisport races at Dorney Lake near Windsor offering triathlon, duathlon, aquabike, aquathlon and open swim distances with chip timing and finisher medals.
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.