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Half Ironman (middle distance) in East of England in May 2026

Find half ironman (middle distance) in East of England in May 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.
  • Sat 16 May 2026
  • £158-£178
Maldon, Essex, UK

Big East Middle Distance Triathlon

The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.

  • Enter online
  • Undulating
  • Age 18 & over
  • 1500 m river swimming
  • 86 km road cycling + 1112 ft ascent
  • 20 km trail running + 172 ft ascent
Conquer the ATW Centurion 100km Triathlon at Box End Lake — a thrilling endurance challenge featuring pristine open water, fast bike laps, scenic trails and unbeatable support.
  • Sun 24 May 2026
  • £117-£137
Bedford, Bedfordshire, UK

ATW Box End Centurion 100km Triathlon

Conquer the ATW Centurion 100km Triathlon at Box End Lake — a thrilling endurance challenge featuring pristine open water, fast bike laps, scenic trails and unbeatable support.

  • Enter online
  • Undulating
  • Age 18 & over
  • 2250 m lake swimming
  • 81 km road cycling + 1674 ft ascent
  • 20 km trail running + 340 ft ascent

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