Triathlons in East of England in Summer
Find triathlons in East of England in Summer - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sun 7 Jun 2026
- £140-£180
ATW Grafman Middle Distance Triathlon & Aquabike
One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.
- Recycling
- Newcomers
- Event village
- Park
- Rural
- Sustainability policy
- Age 18 & over
- Half Ironman
- Middle aquabike
- Sun 21 Jun 2026
- £64-£117
ATW Stewartby Lake Triathlon & Aquabike
Dive into the ATW Stewartby Lake Triathlon and Aquabike – a flat, fast and friendly race offering stunning lake views, smooth roads, and surefire PB potential.
- Recycling
- Newcomers
- Plastic bottle free
- Event village
- Park
- Sustainability policy
- Age 15 & over
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike
- Sun 21 Jun 2026
- £75-£110
Southend Triathlon
Take on an exciting coastal triathlon in Southend, featuring a sea swim, fast seafront cycle, and scenic run with fantastic crowd support all the way.
- Newcomers
- Event village
- Coast
- Age 18 & over
- Sprint triathlon
- Olympic triathlon
- Relay triathlon
- Standard aquabike
- Sat 8 Aug 2026
- £140-£275
- Early bird
ATW Odyssey Triathlon
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a run around the beautiful town of St Neots.
Early bird on now
- Families
- Recycling
- Entertainment
- Music
- Event village
- Park
- Rural
- Sustainability policy
- Age 19 & over
- Ironman
- Half Ironman
- Sat 8 Aug 2026
- £65-£117
ATW St Neots Triathlon | Race 2
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
- Newcomers
- Event village
- Park
- Sustainability policy
- Age 15 & over
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sprint aquabike
- Sun 16 Aug 2026
- £54-£95
ATW Oundle Triathlon
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.
- Newcomers
- Event village
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Sprint aquabike
- Sun 5 Jul 2026
ATW Odyssey At Box End Triathlon
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sprint aquabike
- Standard aquabike
- + 1 more race
- Sat 8 Aug 2026
ATW First To Full Triathlon Festival
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Ironman
- Sprint aquabike
- + 4 more races