Relay triathlons in East of England in Summer

• Sun 7 Jun 2026
• £160-£180

ATW Grafman Middle Distance Triathlon

Take on a superb middle distance triathlon at the fantastic Grafham Water. Suitable for all abilites, with a challenging, but achievable course, and custom medal at the finish line.

• Chip timing
• Enter online
• Undulating
• Age 18 & over

• 1900 m lake swimming
• 90 km road cycling + 1680 ft ascent
• 21 km multi terrain running + 0 ft ascent

• 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
• £96-£117

ATW St Neots Standard Triathlon | Race 2

Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a Standard Triathlon.

• Enter online
• Age 17 & over

• 1500 m river swimming
• 45 km road cycling + 712 ft ascent
• 10 km road running + 0 ft ascent

• Sun 16 Aug 2026
• £74-£95

ATW Oundle Sprint Distance Triathlon

The UK's largest triathlon organiser brings you the Oundle Sprint Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.

• Chip timing
• Enter online
• Age 15 & over

• 600 m pool swimming
• 25 km road cycling + 561 ft ascent
• 5 km trail running + 30 ft ascent