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 263 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
Weekday multisport events at Capernwray Dive Centre offering triathlon, aquathlon, AquaBike and swim distances with quarry swims and local bike and run loops.
Multi-race aquathlon at Guildford Lido and Stoke Park with age groups from 8 to adult and distances from 50m swim/600m run up to 500m swim/5km run.
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 multi-discipline triathlon event at Lake 62 on 5 September 2026 featuring triathlon, aquabike, duathlon, swim and a free family fun run with on-site parking and camping.
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.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
A relaxed community triathlon in South London with open water swim, stationary bike and dockside run where participants choose their own distances.
Monthly Swim Bike Run at Torbay Velopark with pool swims, velopark bike laps and grass and gravel runs for children and adults.
Multi distance triathlon at Moyles Court School with swims at Ellingham Waterski Lake and bike and run courses through the New Forest, plus camping and 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.
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.
Pool start sprint triathlon at Northampton High School with swim, a one lap bike through Salcey Forest and an out and back run; formats include super sprint, aquabike and relays.
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.
Sea swim, a 42 km bike on quiet East Lothian roads and a hilly 10 km run at Gullane Beach on 6 September 2026.
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.