Brentford
Triathlon Calendar near Brentford 2026-2027
Monthly updates for Brentford
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Brentford for 2026-2027! We've gathered 45 exciting races in the area. Check out our detailed list below to find your next local race.
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.
Pool based triathlon in Henley with countryside cycling, a grass run at Gillotts School, multiple distances, relay options and a charity CRUK wave.
Multi-distance triathlon at Dorney Lake with sprint, standard, super sprint, aquabike and relay options on a flat, Olympic-standard course.
Multi-distance triathlon in Windsor on 13 June 2027 with an open-water Thames swim, road cycling past Windsor Castle, and runs along the Long Walk.
Monthly updates for Brentford
Get new running races (and updates) in your inbox every month.
The Bridge Triathlon in Dartford offers multiple race formats with open water swim, bike and run courses, free parking and a range of standard to GO TRI distances.
July 2027
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.
Triathlon at Higginson Park, Marlow on 11 July 2027 offering Half Iron, Olympic and Sprint distances while supporting Macmillan Cancer Support.
One on the River Marlow stages triathlon, duathlon, aquabike, aquathlon and open-water swims at Higginson Park beside the River Thames with chip timing and marked courses.
Triathlon at Dorney Lake offering sprint, standard and super sprint distances plus aquabike and relay options on a flat chip timed Olympic course.
Point to point sportive triathlon from Dorney Lake near Windsor to Brighton sea front with a lake swim, long road bike and trail run across the South Downs.
Multi distance family triathlon at Dorney Lake with open water swims, closed road bike laps, junior Tristar races and a Family Fun non competitive option.
Experience a flat and fast triathlon at the iconic Dorney Lake Olympic venue featuring super sprint sprint and standard distances plus relay and aquabike options.
August 2027
Triathlon at Dorney Lake offering Sprint, Standard and Super Sprint distances with aquabike and relay options on a flat, chip timed course.
A summer multisport event in Henley on Thames with triathlon, duathlon, aquabike, aquathlon and open water swims on the River Thames.
Sprint triathlon at Thorpe Park on 15 August 2027 with a 750m swim, 20K bike and 5K run, supporting Macmillan and including free Thorpe Park admission.
Midweek triathlon at Dorney Lake with Super Sprint, Sprint, Standard, aquabike and relay options on a flat lake course with chip timing and wetsuit hire available.
Multi-distance triathlon festival in London on 21-22 August 2027, featuring the 100 km T100 distance plus Olympic, Sprint and Super Sprint options.
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.
Beginner-friendly triathlon at Surrey Docks with open water swims, static cycling options and flat run routes, focused on community and representation rather than competition.