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Half Ironman (middle distance) in UK

Find half ironman (middle distance) near me in UK for 2024/2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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A lake swim, a trail run and a road ride over the course of the festival weekend. Conquer a triathlon challenge over two days. Includes Full Weekend Festival Ticket in the price!
  • Sat 17 - Sun 18 May 2025
  • £160-£165
  • Sat 17 - Sun 18 May 2025
  • £160-£165
Keswick, Cumbria, UK

Keswick Mountain Festival | Keswick Conqueror

A lake swim, a trail run and a road ride over the course of the festival weekend. Conquer a triathlon challenge over two days. Includes Full Weekend Festival Ticket in the price!

  • Newcomers
  • Music
  • Chip timing
  • Enter online
  • Mountainous
  • Event village
  • Age 18 & over
  • 3.6 km lake swimming
  • 100 km road cycling + 1625 m ascent
  • 25 km trail running + 866 m ascent
Flat, fast and very popular! This open water tri comprises a swim in Regatta Lake, a relatively flat bike course and flat run laps of the lake and River Trent Path . All levels welcome, solo or relay.
  • Sun 18 May 2025
  • £96.67-£260
  • Sun 18 May 2025
  • £96.67-£260
Nottingham, Nottinghamshire, UK

Outlaw Half Nottingham

Flat, fast and very popular! This open water tri comprises a swim in Regatta Lake, a relatively flat bike course and flat run laps of the lake and River Trent Path . All levels welcome, solo or relay.

  • Chip timing
  • Enter online
  • Age 18 & over
  • 1.2 miles lake swimming
  • 56 miles road cycling
  • 13.1 miles road running
Challenge yourself to tackle a 100km Centurion this year, a distance made popular by the PTO race series. Ideal if you're training for a 70.3 Half-Iron or taking a step up from Standard Distance Tri.
  • Sun 18 May 2025
  • £120-£140
  • Sun 18 May 2025
  • £120-£140
Bedford, Bedfordshire, UK

ATW Box End Centurion 100km Triathlon

Challenge yourself to tackle a 100km Centurion this year, a distance made popular by the PTO race series. Ideal if you're training for a 70.3 Half-Iron or taking a step up from Standard Distance Tri.

  • Enter online
  • Undulating
  • Age 18 & over
  • 2250 m lake swimming
  • 80 km road cycling
  • 20 km trail running
This triathlon returns for another successful year! It’s a superb swimming venue with quiet rolling roads for the bike course and a cracking run too. Plus there's lakeside camping available too.
  • Sun 18 May 2025
  • £135
  • Sun 18 May 2025
  • £135
Lifton, Devon, UK

Roadford Lake Triathlon | Middle Distance

This triathlon returns for another successful year! It’s a superb swimming venue with quiet rolling roads for the bike course and a cracking run too. Plus there's lakeside camping available too.

  • Chip timing
  • Enter online
  • Undulating
  • Age 18 & over
  • 1900 m lake swimming
  • 92 km road cycling
  • 21 km road running
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.
  • Sun 1 Jun 2025
  • £165-£186
  • Sun 1 Jun 2025
  • £165-£186
Huntingdon, Cambridgeshire, UK

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 + 1844 ft ascent
  • 21 km multi terrain running + 253 ft ascent
The Middle Distance Triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.
  • Sun 8 Jun 2025
  • £125
  • Sun 8 Jun 2025
  • £125
Weymouth, Dorset, UK

Weymouth Middle Distance Triathlon

The Middle Distance Triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.

  • Chip timing
  • Enter online
  • Undulating
  • Age 18 & over
  • 1900 m sea swimming
  • 90 km road cycling
  • 21 km multi terrain running
Previously known as Mount Edgcumbe Triathlon, triathletes of all abilities can experience a truly exceptional coastal venue, finishers medal, t-shirt and memorable day out at a fantastic event.
  • Sun 15 Jun 2025
  • £99
  • Sun 15 Jun 2025
  • £99
Torpoint, Cornwall, UK

Plymouth Triathlon | Middle Distance

Previously known as Mount Edgcumbe Triathlon, triathletes of all abilities can experience a truly exceptional coastal venue, finishers medal, t-shirt and memorable day out at a fantastic event.

  • Chip timing
  • Enter online
  • Age 18 & over
  • 1.9 km sea swimming
  • 90 km road cycling
  • 20 km trail running
Situated in the renowned Cardiff Bay, this event stands out as a truly memorable city race. The event village and transition area are on Roald Dahl Plass in front of the Wales Millenium Centre.
  • Sun 22 Jun 2025
  • £229.99-£249.99
  • Sun 22 Jun 2025
  • £229.99-£249.99
Cardiff, UK

Cardiff Legend (70.3) Triathlon

Situated in the renowned Cardiff Bay, this event stands out as a truly memorable city race. The event village and transition area are on Roald Dahl Plass in front of the Wales Millenium Centre.

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 18 & over
  • 1900 m lake swimming
  • 88 km road cycling
  • 21.8 km road running
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.
  • Sat 5 Jul 2025
  • £130
  • Sat 5 Jul 2025
  • £130
Saint Neots, Cambridgeshire, UK

ATW Odyssey Half Distance 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.

  • Enter online
  • Undulating
  • Age 18 & over
  • 1900 m river swimming
  • 90 km road cycling
  • 21.1 km road running
One of the most popular distances within the sport of triathlon, catering to both amateur and professional athletes, striking a balance between speed and endurance.
  • Sun 13 Jul 2025
  • £80-£95
  • Sun 13 Jul 2025
  • £80-£95
Ripon, North Yorkshire, UK

Ripon Triathlon Festival | Standard Triathlon

One of the most popular distances within the sport of triathlon, catering to both amateur and professional athletes, striking a balance between speed and endurance.

  • Enter online
  • Age 18 & over
  • 1.5 km lake swimming
  • 40 km road cycling
  • 10 km road running
Award winning full and middle-distance triathlons, plus a marathon, long-distance swims, aquabike options and triathlon relays.
  • Sun 20 Jul 2025
  • 1 charity
  • Sun 20 Jul 2025
  • 1 charity
Eastbourne, East Sussex, UK

TriBourne Festival of Endurance | Middle Distance Triathlon charity places

Award winning full and middle-distance triathlons, plus a marathon, long-distance swims, aquabike options and triathlon relays.

  • Enter online
  • Age 18 & over
  • 1.2 miles sea swimming
  • 56 miles road cycling
  • 13.1 miles trail running
Formerly The London Triathlon, this is one of the world’s biggest triathlons where athletes will race through the capital on a landmark-filled route. London is calling!
  • Sat 2 Aug 2025
  • Sat 2 Aug 2025
London, UK

London T100 | 100km charity places

Formerly The London Triathlon, this is one of the world’s biggest triathlons where athletes will race through the capital on a landmark-filled route. London is calling!

  • Chip timing
  • Enter online
  • Traffic free
  • Age 17 & over
  • 2 km dock swimming
  • 80 km road cycling
  • 18 km road running
Awarded the Event of the year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon in the UK. It is not for the faint-hearted.
  • Sun 3 Aug 2025
  • £224.99-£249.99
  • Sun 3 Aug 2025
  • £224.99-£249.99
Betws-y-Coed, Clwyd, UK

Craft Snowman Legend (70.3) Triathlon

Awarded the Event of the year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon in the UK. It is not for the faint-hearted.

  • Chip timing
  • Enter online
  • Mountainous
  • Age 18 & over
  • 1900 m lake swimming
  • 95 km mountain biking
  • 21.1 km multi terrain running
A gruelling Half Ironman-style challenge set over a weekend starting with a 1.2-Mile Swim on Friday, 56-Mile Sportive on Saturday then a Half Marathon on Sunday, supported by the best ever crowds!
  • Fri 29 - Sun 31 Aug 2025
  • £179
  • Fri 29 - Sun 31 Aug 2025
  • £179
Masham, North Yorkshire, UK

Half Long Course Weekend

A gruelling Half Ironman-style challenge set over a weekend starting with a 1.2-Mile Swim on Friday, 56-Mile Sportive on Saturday then a Half Marathon on Sunday, supported by the best ever crowds!

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 16 & over
  • 1.2 miles lake swimming
  • 56 miles road cycling
  • 13.1 miles road running
The Long Course Weekend challenge specifically tailored to junior athletes. Swim on Friday, cycle on Saturday and run on Sunday. Same massive crowds and the same awesome experience!
  • Fri 29 - Sun 31 Aug 2025
  • £129
  • Fri 29 - Sun 31 Aug 2025
  • £129
Masham, North Yorkshire, UK

Junior Long Course Weekend

The Long Course Weekend challenge specifically tailored to junior athletes. Swim on Friday, cycle on Saturday and run on Sunday. Same massive crowds and the same awesome experience!

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 14-17
  • 1.2 miles lake swimming
  • 56 miles road cycling
  • 10 km road running
Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.
  • Sat 6 Sep 2025
  • £210-£235
  • Sat 6 Sep 2025
  • £210-£235
Ulverston, Cumbria, UK

THE ROC ENGLAND

Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.

  • 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 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
Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.
  • Sat 4 Oct 2025
  • £220-£260
  • Sat 4 Oct 2025
  • £220-£260
Kinlochleven, Highland, UK

THE ROC SCOTLAND

Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.

  • Recycling
  • Plastic bottle free
  • Music
  • Chip timing
  • Enter online
  • Hilly
  • Mountainous
  • Event village
  • Rural
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • 1.5 km lake swimming
  • 53 km mountain biking
  • 18.5 km multi terrain running
  • Sun 8 Jun 2025
Caernarfon, Gwynedd, UK

Slateman Triathlon & Duathlon | Legend (70.3) Triathlon

  • 1900 m lake swimming
  • 92.6 km road cycling
  • 23.1 km road running
  • Sun 29 Jun 2025
Ellesmere, Shropshire, UK

Ultimate Half Triathlon

  • 1.2 miles lake swimming
  • 56 miles road cycling
  • 13.1 miles road running
  • Sun 29 Jun 2025
Hexham, Northumberland, UK

The Northumbrian | Half Iron Distance

  • 1.2 miles lake swimming
  • 56 miles road cycling
  • 13.1 miles trail running
  • Sun 29 Jun 2025
Penrith, Cumbria, UK

Ullswater Epicman Triathlon & Duathlon | Triathlon - Middle Distance

  • 1900 m lake swimming
  • 90 km road cycling
  • 21 km road running
  • Sat 23 Aug 2025
Cairndow, Argyll and Bute, UK

THE RESTLESS Gravel XTRI

  • 1.8 km lake swimming
  • 50 km gravel riding
  • 25 km xc running
  • Sun 31 Aug 2025
Ellesmere, Shropshire, UK

Shropshire Triathlon | Middle Distance and Relay

  • 2 km lake swimming
  • 78 km road cycling
  • 20 km road running

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