Ironman triathlons

Ironman triathlons

Full distance (aka 140.6) triathlon events | 2.4 mile swim + 112 mile bike + 26.2 mile run

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Ironman triathlons in the UK

An Ironman or full distance triathlon is one of the toughest event formats around and only do-able by the most committed athletes with both the physical and mental endurance to cross the finish line. Also called a 140.6 triathlon or full distance triathlon, these long-distance events involve a 2.4-mile swim (3.9km), a 112-mile bike ride (180km), and a 26.2-mile run (42.2km) - a total of 140.6 miles completed in an average of around 10-15 hours. Select your location for full distance triathlons in your area or scroll down to see major events coming up.

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Full distance triathlons in 2024/2025

Featured events are listed below - select your region to see all events.

A gruelling Ironman-style challenge set over a weekend starting with a 2.4-Mile Swim on Friday, 112-Mile Sportive on Saturday then a Marathon on Sunday, supported by the best crowds you'll ever find.
  • Fri 6 - Sun 8 Sep
  • £299-£349
Masham, North Yorkshire, UK

Full Long Course Weekend

A gruelling Ironman-style challenge set over a weekend starting with a 2.4-Mile Swim on Friday, 112-Mile Sportive on Saturday then a Marathon on Sunday, supported by the best crowds you'll ever find.

  • 2.4 miles lake swimming
  • 112 miles road cycling
  • 26.2 miles road running
Full Iron Triathlon distance with 4 laps in the famous Kielder Water, a cycle into the Scottish Lowlands then an off-road trail run along forest trails. It's a huge challenge on the legs!
  • Sun 29 Jun 2025
  • £310-£330
Hexham, Northumberland, UK

The Northumbrian | Full Iron Distance

Full Iron Triathlon distance with 4 laps in the famous Kielder Water, a cycle into the Scottish Lowlands then an off-road trail run along forest trails. It's a huge challenge on the legs!

  • 2.4 miles lake swimming
  • 112 miles road cycling
  • 26.2 miles trail running
  • Sun 28 Jul
  • £350
Nottingham, Nottinghamshire, UK

Outlaw Nottingham Weekend | Outlaw Nottingham

The original Outlaw! Outlaw Nottingham Weekend hosts the award-winning long-distance event, Outlaw Nottingham, affectionately known as “the Full.”

  • 2.4 miles lake swimming
  • 112 miles road cycling
  • 26.2 miles road running
  • Sat 10 Aug
  • £195
Dartford, Kent, UK

Midnight Man | Long Distance Triathlon

Midnight Man is still the cheapest Long Distance Triathlon in the UK.

  • 3800 m lake swimming
  • 180 km road cycling
  • 42 km road running
  • Sun 1 Sep
  • £175
Morpeth, Northumberland, UK

Geordieman | Full Distance Triathlon

Do you have what it takes to be a GEORDIEMAN?

  • 2.4 miles lake swimming
  • 112 miles road cycling
  • 26.2 miles trail running
  • Sat 7 Sep
  • £335-£460
Caernarfon, Gwynedd, UK

The Brutal Extreme Triathlon | Full Brutal

Take on one of the World’s Toughest Triathlons…

  • 2.4 miles lake swimming
  • 116 miles road cycling
  • 26 miles trail running
  • Sat 7 Sep
  • £445-£560
Caernarfon, Gwynedd, UK

The Brutal Extreme Triathlon | Double Brutal

Take on one of the World’s Toughest Triathlons…

  • 4.8 miles lake swimming
  • 232 miles road cycling
  • 52 miles trail running

Ironman triathlons near you

Select your location for Ironman and 140.6 triathlons in your area.