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Relay triathlons in UK in September 2025

Find relay triathlons near me in UK in September 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Get involved in this Grafham Triathlon, brought to you by the largest triathlon organiser in the UK!
  • Sat 13 Sep 2025
  • £94-£115
  • Sat 13 Sep 2025
  • £94-£115
Huntingdon, Cambridgeshire, UK

ATW Grafham Standard Triathlon

Get involved in this Grafham Triathlon, brought to you by the largest triathlon organiser in the UK!

  • Chip timing
  • Enter online
  • Age 17 & over
  • 1500 m lake swimming
  • 38 km road cycling
  • 10 km road running
Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.
  • Sun 14 Sep 2025
  • £83-£98
  • Sun 14 Sep 2025
  • £83-£98
Aviemore, Highland, UK

Aviemore Triathlon | Long Hard Durty

Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.

  • Chip timing
  • Enter online
  • Hilly
  • Age 15 & over
  • 1000 m lake swimming
  • 18 km mountain biking
  • 9 km trail running
Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.
  • Sun 14 Sep 2025
  • £73-£88
  • Sun 14 Sep 2025
  • £73-£88
Aviemore, Highland, UK

Aviemore Triathlon | Short Fast Durty

Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 500 m lake swimming
  • 12 km mountain biking
  • 5 km trail running
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.
  • Sun 21 Sep 2025
  • £94-£115
  • Sun 21 Sep 2025
  • £94-£115
Maldon, Essex, UK

ATW Big East & Maldon Standard 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 17 & over
  • 1500 m river swimming
  • 40 km road cycling
  • 10 km trail running
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.
  • Sun 21 Sep 2025
  • £155-£175
  • Sun 21 Sep 2025
  • £155-£175
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
  • 20 km trail running
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.
  • Sun 21 Sep 2025
  • £73-£94
  • Sun 21 Sep 2025
  • £73-£94
Maldon, Essex, UK

ATW Big East & Maldon Sprint 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 15 & over
  • 750 m river swimming
  • 25 km road cycling
  • 5 km trail running

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