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What you need to know about Half Ironman Triathlon

Discover awesome Half Ironman — also known as middle distance, or 70.3 — triathlon events. Swim 1.9km, bike 90km, run 20km.

Trending Half Ironman Triathlons

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The rapturous reception afforded to previous Castle Howard Triathlons subsequently led to the expansion of a 2-day weekend extravaganza.

In its 9th year, the Castle Howard Triathlon will be the 4th weekend event of the 2018 Castle Tri Series and will once again feature the obligatory picture postcard backdrop and a course with something for every level of triathlete. The 13,000 acre grounds of Castle Howard form arguably the most physically demanding triathlon course of the Castle Tri Series.

Race entrants will start the race by swimming through Castle Howards Great Lake before transitioning into the technical bike route through the glorious rural idyll of Yorkshire and the Howardian Hills. The spectacular run leg passes through the undulating countryside of the estate before a sprint finish tops everything off in style right in front of the main doors of the house. Theres never been a better time to visit Gods Own County and Castle Howard.

The construction of Castle Howard took more than 100 years before being finally completed in the 18th Century, and spanned the lifetime of three earls and numerous architects, although Sir John Vanbrugh is credited with the original design. The Great Lake is the setting for the swim section of the triathlon.

Set in the Howardian Hills, the bike legs initially take in the 18th Century Avenue, a main road that runs in a straight line from south to north for five miles. The run will pass The Temple of the Four Winds and one of the finest, free-standing mausoleums in Europe. A hop over New River Bridge, a circumnavigation of South Lake and the Atlas Fountain will take racers to the finishing straight in front of Castle Howard itself.

Castle Howard has been a regular backdrop for films and television, with both ITVs lauded Brideshead Revisited in the early 1980s and the acclaimed 2008 feature film production shot on location here, hence the name of our adult races.

NB All timings are approximate.

Castle Howard Triathlon

Castle Howard, North Yorkshire, GB
1 race
£198£220
Castle Howard Triathlon
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New location, new course, probably the fastest middle distance triathlon in the South East.

Owler Tris offer middle distance plus standard triathlons, aquabikes and OWS.

The triathlons will start in Lydd Lake with a two lapped swim, before competitors ride a flat lapped bike route on scenic country roads through Lydd, Brooklands and Camber, before returning to transition at Lydd lake.

The 21K run section is flat two laps out and back route along paths around lake and surrounding paths. The standard run also follows the same route. You then head to cross the finish line in style.

Also on offer the Owler Aquabike both at half and standard distance.

Owler Tri

Romney Marsh, GB
1 race
£130£150
Owler Tri
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Are you a Fugitive? The Fugitive gives you the chance to make a run for it and escape, racing only against the clock to see if you will get caught before its too late. With only the fastest over the line, before the cut off, only becoming free to runaway with a bespoke finishers medal and the honour of being from captivity.

One of the only half iron distance triathlons in the Thames Valley! Challenge yourself and achieve something incredible, whether you choose to take on the sprint, olympic or half iron distance. The route takes you through Marlow and its picturesque surroundings. And all within easy reach of London and other major centres.

The Fugitive Triathlon

Marlow, Buckinghamshire, GB
1 race
£105£140
The Fugitive Triathlon
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Will you conquer 'the toughest physical challenge in the UK' - the Snowman Legend 71.6 in 2018?

This epic race holds a special place in the hearts of everyone who has experienced it and features everything that makes this Always Aim High event one of the 'must do' races of the season!

Featuring a breathtaking swim in Llyn Mymbyr at Plas y Brenin (the national mountaineering centre), the competitors then take on a truly epic cycle through the heart of the Snowdonia National Park.

For competitors taking part in the Legend 71.6 and Full distance races, the Snowman offers one of the toughest 'runs' the UK has to offer - to the summit of Moel Siabod and straight back down to the finish line at Plas y Brenin! Sprint runners will race on a much flatter, but equally stunning course.

The Snowman Triathlon

Betws-y-Coed, GB
The Snowman Triathlon
Official Partner

Join likeminded athletes for 3 days of sporting fun based out of beautiful Roadford Lake.

This is an opportunity to complete a Full or Half Distance triathlon over 3 days, giving you time to recover between each discipline.

Taking part in the Immortal Weekender consists of a 2.4 mile or 1.2 mile swim on Friday early evening, a challenging 112 or 56 mile cycle sportive on Saturday, leaving just a multi-terrain Marathon or Half Marathon (26.2 or 13.1 mile) on Sunday!

Make a family weekend of it, there will be plenty of other events taking part including the elements distances and awesome activities on the lake.

The Immortal Weekender

Lower Goodacre, Devon, GB
The Immortal Weekender
Official Partner
Sold Out

Stanwick Lakes is a unique 750acre countryside attraction and nature reserve in the heart of Northamptonshire's beautiful Nene Valley. It offers extensive play areas to keep adventurous families entertained for hours, and for nature lovers, runners and cyclists, acres of wide open spaces and paths. With tranquil lakes, a scenic undulating bike course and a flat run this is ideal for a late season open water triathlo

Make sure you bring the family along; the kids will have a great time in the Park!

Stanwick Lakes Triathlon

Irthlingborough, Northamptonshire, GB
1 race
£71.20£115.70
Stanwick Lakes Triathlon
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Situated on the world famous Antrim Coast Road you will find Ballygally beach, nestled under the Sallagh Braes and home to the historic Ballygally Castle. Views of the infamous North channel and the Mull of Kintyre will meet you as you stand ready for a running beach start and a day of endurance, courtesy of Force 12 events.

No one can dispute the beauty of the Antrim Coast, an area steeped in history, culture and myth... but truly unforgiving for the unprepared.

The White Bear is a tough triathlon and will without a doubt test you. The nature of this triathlon will present challenging open water swimming conditions, a relentless cycling route and a gradually ascending run that concludes with a descent through the Sallagh Braes unveiling spectacular views and the sound of applause from a fantastic local community when you cross the finish line at the White Bear.

The White Bear Triathlon – Half and Full distance

Ballygalley, Larne, GB
The White Bear Triathlon – Half and Full distance
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The iconic Avenger Triathlons return to Ragley Hall, near Alcester in Warwickshire for the sixth time.

The start and finish for all three distances will be in the magnificent Ragley grounds, which also provide activities for all the family.The swim takes place in the boating lake and is based on a 650m lap. From the lake, it is a short, slightly uphill run to transition. The bike routes then take competitors along the drive and out into the beautiful, rolling Warwickshire and Worcestershire countryside, returning to Ragley Hall via the imposing main gates and up the sweeping drive past the Hall itself. The run course, used for the first time in 2016, is based on a 5km lap through woodland tracks, gardens, historic outbuildings and fields of the estate.

This provides all the competitors with a chance to enjoy some of the spectacular scenery Ragley Hall has to offer. In 2017, competitors described the run course as tough but stunning, with great support all the way around.

The Avenger Triathlon

Ragley Hall, Warwickshire, GB
The Avenger Triathlon
Official Partner

Take part in the Chilterns Triathlon, in the heart of the Thames Valley and only an hour from London.

This is one of the most scenic triathlons in the country around the Chiltern Valley and on the banks of the River Thames to this September, come and celebrate a multitude of activities that combine the Henley Festival of sport.

The Chilterns Triathlon has both a Middle Distance Triathlon, Sprint + Triathlon (Longer Bike Section- 30km) & an Olympic + Triathlon (Longer Bike Section - 55km) All of these events use some of the roads from the old Challenge Henley Triathlon Course.

Conquer The Chilterns Triathlon

Fawley, Buckinghamshire, GB
Conquer The Chilterns Triathlon
Official Partner

Welcome to the 2018 Sandman Triathlon powered by Suunto, the third and final race in the Always Aim High 'SUUNTO Adventure Triathlon Series'.

The Sandman Triathlon race venue is incredible Newborough Forest, the start and finish set in an exclusive area within the 700ha woods adjacent to the world famous Llanddwyn Beach.

The Anglesey Sandman Triathlon has something for all abilities and comprises of four distances, the Legend 72.4, Savage, Full and Sprint. You will also be able to compete as a relay team in both the full and sprint distances.

The Sandman Triathlon

Llanfairpwllgwyngyll, GB
The Sandman Triathlon
Charity Tickets

Hever Castle Triathlon has established itself as an essential destination for British and international triathletes and the mainstream media, for its picture postcard venue, elite action, age-group choice and festival atmosphere. Put simply, instant classic doesnt do the Hever Castle Triathlon justice.

The races commence with an open-water swim in the spectacular 38 acre Hever Castle Lake and River Eden, transitioning into the undulating cycle that takes athletes around a circuit through the High Weald of Kent, an Area of Outstanding Natural Beauty, and up to the stunning Ashdown forest for the longer distance races. The largely off-road run circumnavigates the estate and award-winning castle grounds before athletes make the dash to the tree-lined finishing chute beside the lake.

Hever Castle Triathlon

Hever, Kent, GB
Hever Castle Triathlon
Official Partner

Become Immortal on the 12th May 2019.

The Immortal Middle Distance triathlon returns to the Iconic Stourhead Estate in Wiltshire. The superb venue guarantees fantastic facilities and breath-taking scenery. Your supporters have no excuse not to join you in celebrating your Immortal Triumph!

Immortal Half – Stourhead

Stourton, Wiltshire, GB
1 race
£124£160
Immortal Half – Stourhead

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