South East (England)
Triathlon Calendar South East (England) 2026-2027
Monthly updates for South East (England)
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Explore the best triathlons in South East (England) for 2026-2027! Our updated list features 55 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!
May 2027
Pool based triathlon at Tonbridge School offering sprint and standard formats plus aquabike, aquathlon and relay options, with a race licence required.
East Grinstead Triathlon on 9 May 2027 features pool swims, a 26 km bike through nearby villages and town runs, with relay, Try a Tri and aquabike options.
A club run event at Sevenoaks Leisure Centre with a 400 m pool swim, a 25 km undulating bike through Kent and a run through Knole Park.
Triathlon at Arundel Lido on 16 May 2027 with Standard and Sprint options, heated 25m pool swims, a rolling bike course and run routes near the castle.
Multisport festival at Dorney Lake on 16 May 2027 featuring triathlon, duathlon, aquabike, open water swims and 5K to 15K runs, entry from £25.
Monthly updates for South East (England)
Get new running races (and updates) in your inbox every month.
Marlow Triathlon on 30 May 2027 at Higginson Park features open water River Thames swims, cycling through the Chilterns and riverside runs, with medals and chip timing.
Multisport event at Higginson Park in Marlow featuring triathlon, duathlon, aquabike, aquathlon and 750m 1500m 3000m open water swims with chip timed results and finisher medals.
June 2027
Midweek triathlon at Dorney Lake offering Super Sprint, Sprint, Standard, aquabike and relay options on a flat, chip timed course with wetsuit hire available.
Triathlon at Blenheim Palace on 5–6 June 2027 with SuperSprint and Sprint distances, a lake swim, closed road bike course and a finish line festival.
Pool swim, rural cycle and grass run in Henley offering Sprint, Super Sprint, fun and charity CRUK Wave options with chip timing and relay entries.
Sprint triathlon and junior aquathlon at Dover Leisure Centre on 6 June 2027, with a 400 m pool swim, 14 km bike and 5 km run plus age-group junior races.
An inclusive triathlon at Patcham High School with pool swims, tarmac bike and run stages across several race distances, plus an event village with vendors and activities.
Multi-distance triathlon at Dorney Lake with sprint, standard, super sprint, aquabike and relay options on a flat, Olympic-standard course.
Triathlon on Sunday 13 June 2027 at White Oaks Leisure Centre in Swanley, offering sprint, standard and aquabike races with published entry fees.
A long running triathlon in Windsor with a River Thames swim, country cycle and a run past Windsor Castle; Sprint and Olympic distances plus relay entries are available.
Multi distance triathlon at Dartford with lake swims and multi lap bike and run courses, including Standard, Sprint, GO TRI and Aqua Bike formats.
July 2027
Pool swim followed by a flat run along Littlehampton seafront on 4 July 2027, with 800m/10km and 400m/5km options and age categories.
Midweek Dorney Triathlon at Dorney Lake offers sprint, super sprint, aquabike and relay options on a flat, chip timed course with wetsuit hire and free parking.
A multi-discipline event in Winchester with a 20 km bike, 2 km kayak and 5 km run, open to individuals or relay teams with standard and early bird fees.
A multi-distance triathlon festival on the South Downs coast with closed-road bike courses, seaside swims, youth races and relay and single-discipline options.