South East (England)
Triathlon Calendar South East (England) 2026-2027
Monthly updates for South East (England)
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in South East (England) for 2026-2027! Our updated list features 48 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!
August 2026
Inclusive triathlon at Dorney Lake on 15 August 2026 offering three distances, adaptive equipment options, team relays and a celebrity relay with no cut off times.
A family adventure race at Alice Holt Forest on 16 August 2026 offering The Pack and Wolf Cub Challenges with combined cycling and on foot sections.
Two triathlon races at Queenford Water Park in Oxfordshire, including a June sprint and an August Olympic distance with chip timing and race photos.
A sprint-distance triathlon at Thorpe Park on 23 August 2026 with a 750m lake swim, 20 km bike and 5 km three-lap run. Organised by RunThrough, the event supports Macmillan and includes Thorpe Park entry.
Whitstable triathlon with a tidal 500 m swim, a 20 km bike on open roads and a 5 km run along Tankerton Slopes; registration and pricing details apply.
Monthly updates for South East (England)
Get new running races (and updates) in your inbox every month.
Evening triathlon at Dorney Lake with sprint and super sprint races, aquabike and relays, chip timing, wetsuit hire and free parking.
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 events at Dorney Lake with Super Sprint, Sprint and Standard distances plus aquabike and relay options at an Olympic venue.
September 2026
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.
Multi-distance triathlon at Moyles Court School with swims at Ellingham Waterski Lake, cycling through the New Forest and an on-site event village for spectators.
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 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.
A multisport event at Dorney Lake, offering triathlon, duathlon, aquabike, aquathlon and open water swims with marked courses and chip timing.
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.
Multisport score format race in the South Downs with run, bike and kayak options for solos and teams of two to four.
Pool swim, fast bike loops and a lapped park run at Woking Leisure Centre offering junior and adult triathlon and aquathlon races.
A team relay triathlon at Southwater Country Park on 13 September 2026 featuring a 400m swim, 18km cycle and 3.8km run per athlete with wetsuits compulsory.
Tri Reigate at Buckland Park offers sprint and standard triathlon routes around a lake and country lanes, supporting Macmillan Cancer Support.
A closed-road triathlon at Willen Lake offering Sprint and Standard distances, plus aquabike and relay options. The event features calm open water, a traffic-free bike course and a flat lakeside run.