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Half Ironman (middle distance) in UK in September 2026

Find half ironman (middle distance) in UK in September 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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Face up to the mountain in one of Europe's most inspiring locations. From Windermere to Coniston to summit England's highest mountain, if you love a tough and rewarding challenge - you'll thrive.
  • Sat 5 Sep
  • £215-£260
Ulverston, Cumbria, UK

THE ROC ENGLAND

Face up to the mountain in one of Europe's most inspiring locations. From Windermere to Coniston to summit England's highest mountain, if you love a tough and rewarding challenge - you'll thrive.

  • Recycling
  • Plastic bottle free
  • Music
  • Chip timing
  • Enter online
  • Mountainous
  • Event village
  • Rural
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • 1.5 km lake swimming
  • 92 km road cycling
  • 18.5 km multi terrain running
The Legend returns to Bala for the first time since 2017 and it’s ready to challenge and inspire like never before. This is your chance to go further, dig deeper, and achieve something extraordinary.
  • Sun 6 Sep
  • £239.99-£259.99
Bala, Gwynedd, UK

Triathlon Y Bala | Legend (70.3) Middle Distance

The Legend returns to Bala for the first time since 2017 and it’s ready to challenge and inspire like never before. This is your chance to go further, dig deeper, and achieve something extraordinary.

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 18 & over
  • 1900 m lake swimming
  • 85 km road cycling
  • 21.1 km road running
The Sundowner 70.3 Triathlon is back! Race as the sun sets in an unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire which is now back on the race calendar.
  • Sat 12 Sep
  • £110-£125
York, East Yorkshire, UK

Sundowner 70.3 Triathlon

The Sundowner 70.3 Triathlon is back! Race as the sun sets in an unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire which is now back on the race calendar.

  • Chip timing
  • Enter online
  • Flat
  • Age 18 & over
  • 1900 m lake swimming
  • 90 km road cycling + 287 ft ascent
  • 21 km trail running + 17 ft ascent
An unforgettable adventure triathlon, The Sandman has been described as one of the most beautiful and thrilling multi-terrain races in the UK, featuring the Middle Distance National Championships.
  • Sun 27 Sep
  • £239.99-£259.99
Llanfairpwllgwyngyll, Isle of Anglesey, UK

Superfeet Sandman Legend (70.3) Triathlon

An unforgettable adventure triathlon, The Sandman has been described as one of the most beautiful and thrilling multi-terrain races in the UK, featuring the Middle Distance National Championships.

  • Chip timing
  • Enter online
  • Undulating
  • Age 18 & over
  • 1900 m sea swimming
  • 93 km road cycling + 912 m ascent
  • 20 km multi terrain running + 176 m ascent

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