Full Iron Distance
Sun 30 Jun 2024 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!

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  • Sun 30 Jun 2024
Kielder Waterside Caravan Park, Hexham

Full Iron Distance



Age 18 & over on 31 Dec 2024

  • 2.4 miles lake swimming
  • 112 miles road cycling
  • 26.2 miles trail running


Do you have what it takes to conquer The Northumbrian?

Kielder Forest including the largest man-made lake in Northern Europe, Kielder Water, is a vast expanse of pine forest and hard-packed trails, stretching up to the Scottish Border and is the perfect staging ground for an ultra-distance triathlon.

Cycle alongside Kielder Water

The ultimate endurance test will be open to a limited number of individuals and teams to conquer the beautiful waters, forests and terrain that give Northumberland and Kielder its unique character.

The summer of 2024 will welcome the third edition of the event which combines scenery, fortitude, adventure, and achievement. Everything it takes to be recognised as a Northumbrian.


  • Stunning location

    Kielder Water is the HQ for this triathlon, providing incredible views across the water.

  • Solo or team

    Race individually or as a team of three to divide and conquer.

  • Brutal challenge

    Including steep climbs that journey into Scotland, the cycle leg is a real challenge.

There can be few greater tests of endurance and resilience and no greater sense of pride and achievement, in completing such a challenge.

This is the ultimate triathlon. The one you won't forget.

This event is part of The Northumbrian.

Event video

  • All fitness levels
  • Event village
  • Free venue entry
  • Spectators
  • Swim hat provided
  • Teams
  • Traders at event
  • Wetsuit not allowed if too hot
  • Wetsuit required
  • Wetsuit required if too cold


  • 13:00-20:00 | Registration

    It is advised that all participants register on Saturday.

  • 13:00 | Transition opens

    You are encouraged to rack your bike with security in place over night.



  • 04:30 | Registration opens

    All team members must have registered pre-event.

  • 05:45 | Transition closes

    Please ensure you've racked your bike before then.

  • 06:15 | Races begin

    Half and full distance races begin.

rack your bike

Teams of 3

Take on The Northumbrian as a relay team of three people. Cheer your team mates on before you take on your leg of the Northumbrian! Please ensure you and your team mates are confident in your ability to complete the course before entering. Choose your relay leg carefully.


There will be recommended course viewing spots in the race guide which will be online 4 weeks prior to the event.

Support crews

Athletes are allowed a support crew. Support crews on the run and bike routes must be stationary, however they are allowed to move from point to point. Support crews must not ride or run with competitors due to the nature of the course and medical resources. Your support crew may hand out bottles and food. 

Bike type

  • Road bikes are recommended
  • TT bikes are allowed
  • Mountain bikes and hybrid bikes are allowed but are not recommended as the ride is all on tarmac

Transition zone

There will be a standard triathlon transition zone with enough space for you to lay out all of your kit.

  • Accommodation
  • Bag storage
  • Bar
  • Cafe
  • Free parking
  • Music
  • Restaurant
  • Rural
  • Toilets

Event HQ

Kielder Waterside Caravan Park
NE48 1BT

The setting

  • Swim in the breath-taking serenity of the famous Kielder Water.
  • Bike through the stunning valley and a raid over the Border to conquer the challenging, inspiring roads.
  • Run along the infamous forest trails that host the testing Kielder Marathon.


There will be a number of event car parks within a mile of the event site. If arriving for registration on Saturday you can park at Kielder Waterside while registering. On event day please use event car parks only, Waterside will not be accessible by car.

Public transport

There is very limited public transport in the area. Please ensure you are able to make your own travel arrangement to the event for yourself and your bike before registering.


Recommendations are available.

  • Cut off time
  • Distance markers
  • Entertainment
  • First aid
  • Food stations
  • Hilly
  • Marshals
  • Mass start
  • Multiple laps
  • No headphones
  • Partly closed roads
  • Toilets
  • Water stations
  • Way markers
4 laps in the breath-taking serenity of the famous Kielder Water, entry and exit via slipway. Wetsuits are mandatory.

Cut off time

2hrs 20 minutes after race start.

2 laps through the stunning valley and a ride over the Border to conquer the challenging, inspiring roads. The majority of the route will be on open roads however there will be some partial closures for safety, the route will be fully marshalled including Moto marshals. Non-drafting, bikes must comply with British Triathlon rules.

Cut off time

10hrs 30 minutes after race start.

4 laps of Bull Crag covering the infamous Forest trails that host the testing Kielder Marathon.

Cut off time

17hrs 45 minutes after race start.


Wetsuits are compulsory below 14 degrees celcius, optional between 14 – 22 degrees celcius and and no wetsuits allowed from 22 degrees celcius up.

wetsuits required

  • Chip timing
  • Goody bag
  • Medal
  • Physio
  • Race photo
  • Technical t-shirt
  • Trophy


  • The Northumbrian Band of Climbers Cycling Jersey
  • Swim cap
  • Electronic chip timing
  • On course support
  • On course nutrition
  • Medal and registration goody-bag

  • Age 18 & over on 31 Dec 2024
  • 300 places
  • Entries open
  • Enter online
  • Event merch available
  • Race pack by post
Enter now

Teams of 3

This race can be entered as a relay team of 3 people.

Entry fees

Entry fee


Valid to 31/12/2023

Team entry fee


Valid to 31/12/2023

Entry fee


Valid from 01/01/2024

Team entry fee


Valid from 01/01/2024

Fantastic event, my first 70.3 and glad it was this one. I’ll be back! Se H

Came up from Portsmouth for this event - well worth it. Quite unique and fabulous team. The Northumbrian rocks! (it is pretty hilly though ....) Peter I

All round brilliance. Donal C

Incredible event, myself and my business partners put together a team for the half ironman, and we loved it!! Cannot wait to be back again next to do it all again. Amazing event, cannot recommend enough!!! Ben S

Out of all the Half IM events I have participated in this was my favorite by far. The scenery was beautiful and the event was well organised, friendly and really enjoyable. I’ll definitely be back and have recommended this event to friends and family. Michelle S

Amazing epic event, will be back for more next year. Sarah H

Great day out! Will be back! James S

The atmosphere is amazing, so much support all the way round, marshals and aid stations are second to none. Orginised so well, fantastic event. Tough going tho. Anthony L

Reviews thanks to RaceCheck

Other races at event

  • Sun 30 Jun
  • #2 of 2
Kielder Waterside Caravan Park, Hexham

Half Iron Distance



Age 18 & over

  • 1.2 miles lake swimming
  • 56 miles road cycling
  • 13.1 miles trail running