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 45 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!
July 2026
Triathlon at Dorney Lake on 26 July 2026 with Super Sprint, Sprint and Standard distances, plus Aquabike and relay options. Chip timing, themed medal, free photos, and an event village; the event supports Macmillan Cancer Support.
Sprint triathlon with an indoor pool swim, a road bike route through Worplesdon Pirbright and Normandy, and a 5 km forest trail run at Surrey Sports Park on 26 July 2026. A Kids TriStar Aquathlon for ages 8 to 14 is also included and the event suppor..
Triathlon at Dorney Lake offering Sprint, Standard, Super Sprint, aquabike and relay options on a flat, chip timed course in an Olympic venue.
August 2026
Multi-distance triathlon day at Emberton Country Park featuring middle, standard and sprint formats plus aquabike, aquathlon and relay options.
Triathlon at Dorney Lake offers sprint, standard and super sprint races on a flat bike and run course with aquabike and relay options. British Triathlon membership and a race licence are required.
Triathlon at Dorney Lake on 8 August 2026 offering Super Sprint, Sprint and Standard distances, plus aquabike and relay options. Entries include a themed medal, chip timed results and free race photos.
Open water swim and aquathlon at The Bridge in Dartford with multiple swim distances and two aquathlon options; wetsuits are compulsory.
Midweek Aquathlon at DA1 5PR combines a 650 m open water swim with a three lap 5.7 km run, limited to 40 participants for water safety.
SPRINT Superhero Tri is a short multisport challenge with a 150 m swim, 3 km bike and 1 km push/run. Entries can be solo, relay, or pulling a Superhero; everyone on course must be registered and receives a medal, T shirt and Super Kit Bag.
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.
Evening triathlon at Dorney Lake on 26 August 2026 offering Sprint, Super Sprint, Aquabike and relay formats. The clear lake, flat bike and run course and chip timed results are central features.
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.
September 2026
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.
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 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.
Pool swim, fast bike loops and a lapped park run at Woking Leisure Centre offering junior and adult triathlon and aquathlon races.