Hever Castle | Castle Triathlon Series | Castle Triathlon Series

The Series

Hever Castle Triathlon

The UK’s second biggest triathlon, the world’s largest children’s triathlon and the finale of both the Castle Tri Series and the UK triathlon season.

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Hever Castle Triathlon

Saturday 25th and Sunday 26th September 2021

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 doesn’t do the Hever Castle Triathlon justice.

Sibling bonding, friendship and sporting camaraderie are the theme at the Hever Castle Triathlon. The World’s largest children’s triathlon continues the Brownlee spirit, with a festival of sport at the historical Kentish and iconic venue.

As in previous years, the children’s races are split over two days (8-10 year olds on Saturday afternoon and 11-15 year olds on Sunday afternoon).

The Half Iron Gauntlet’s unique swim loop around the River Eden and Sixteen-acre island was hailed as one of the best open water swim routes on the UK circuit. The iconic long-distance Bastion is returning to Hever Castle on Sunday 4 July 2021

The races will again 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 as well as taking runners through land owned by the Bellhurst Nature Conservation Trust (the majority of this section is not on public rights of way), then returning to the award-winning castle grounds before athletes make the dash to the tree-lined finishing chute beside the lake.

Hever Castle Triathlon 2015/2016 - Stunning course for all levels of triathletes

About Hever Castle

Famous for its links with the Tudors, particularly Henry VIII, there have been three main periods in the construction of this historic castle.

The oldest part of the castle dates to 1270 and consisted of the gatehouse and a walled bailey. In the early 1500s the Bullen family acquired the castle and added a Tudor dwelling within the walls. Hever Castle was also the childhood home of Anne Boleyn, the mother of Queen Elizabeth I.

In 1903, William Waldorf Astor restored Hever Castle, building the Tudor Village and creating the gardens and Hever Castle Lake, which plays host to the swim section of the triathlon and took 800 men to dig by hand and took two years to construct.

Since 1983, the castle has been owned by Broadland Properties and is now open to the public. The castle itself houses historic 16th Century Tudor portraits, furniture and tapestries, and two magnificent prayer books inscribed by Anne Boleyn.

Film buffs will note that Hever Castle provides the a backdrop to 1987’s fairytale comedy classic The Princess Bride, starring Cary Elwes and Robin Wright, and 2008’s Inkheart with Brendan Fraser.

Socially Distanced Event Format

A safe way to continue racing together!

We organised a hugely successful socially distance event at Hever Castle in September 2020 for over 4000 participants and their supporters. This has given not only us, the Industry but most importantly our participants, the confidence to return to racing in 202!.

We want to reassure all participants that we’ll continue to work closely with governments, governing bodies, venues and suppliers to ensure that our 2021 events are run in accordance with current health and safety guidance.

Our increased health and safety measures cover 5 key principles of education; touch point reduction, density reduction, athlete self-reliance and enhanced hygiene.

Should we be require to put on a socially distanced event, participants will still get the full race experience but with individual rolling starts, 1 competitor every 10 seconds (sometimes greater), restricted time on site either side of your race and possible limit on spectators per athlete only.

We will prepare venue specific documents to send to all participants ahead of the event. These will include details on how to prepare pre-event, arrival timings and movements, swim, cycle, run, festival village and exit.

We are delighted to have been awarded the 2022 GB Team Age-Group Qualifier for the Standard Distance Duathlon and look forward to providing an outstanding race 2021 format for all participants wish to qualify for the GB Team.

2021 Standard Distance Duathlon World Championship Qualifier

Sunday 26th September 2021

The Hever Castle Duathlon will retain it’s GB Age-Group Team Qualifier status in 2021, however the Championship which the event will offer qualification for is to be confirmed and is subject to confirmed Championship dates from the World Triathlon and Europe Triathlon.

For further up to date information on Championship events and their qualifying events as the current situation develops, please check the Qualification section in each event webpage on the British Triathlon website here.

See more about Age-Group Qualifiers here. For further questions please email agegroup@britishtriathlon.org

If you intend to qualify for the GB Age-Group Team at Hever Castle you must register your intent to qualify with the BTF by 5pm Friday 24th September 2021.

We are delighted to have been awarded the GB Team Age-Group Qualifier for the Standard Distance Duathlon and look forward to providing an outstanding race 2021 format for all participants wish to qualify for the GB Team.

Go long for the Gauntlet

Hever Castle witnessed hundreds of hardy triathletes taking on the exciting Gauntlet, a middle-distance race that pushed competitors to their limit via a 1.9km swim, 90km bike ride and 21km run.

The race distance had a hugely successful launch in 2013 at the Chateau de Chantilly and Hever Castle Triathlons, with hardened triathletes and newcomers to the triathlon and middle-distance racing side-by-side on the start line.

Hever Castle Swim in association with Outdoor Swimmer magazine

Saturday 25th September 2021

The swim only event provides the choice of three different distances: 5km 2.5km and 1mile (see price table below) and boasts a unique and stunning swim route, which takes in the Castle Lake and River Eden and circumnavigates 16 Acre Island. View swim course here.

The swim described by many triathletes as the ‘best open water swim ever completed’ will now be open to outdoor swimmers as an event in its own right.

All swimmers will be provided with timing chips and the races categorised into wetsuits and non-wetsuits. Prizes will be awarded for the top three male and female competitors in each distance.

One mile leisure and family swim

Enjoy the beautiful setting of Hever Castle at your own pace. Swim any stroke you like (breaststroke encouraged), swim and chat with friends as you go around. Don’t worry about how long it takes (however time limit set at 90 minutes), just enjoy it. Under 16s welcome if accompanied throughout by a competent responsible adult.

10K, Half Marathon and Marathon

Sunday 26th September 2021

Building on the success of the Castle Run Series introduced in 2018, the multi-terrain Marathon, Half Marathon and 10K runs will be returning to iconic Hever Castle in.

This stunning and unique course will incorporate spectator friendly loops of beautiful Kentish countryside, the Hever Castle lake, quaint local villages and of course Hever Castle itself. Each runner will receive a medal and will be welcomed across the finish line with a banquet of well-earned treats, with live bands, food stalls, a retail area and camping at the castle making the weekend a festival of sporting achievements.

Multisport Distances

Duathlon, Aquabike, Aquathlon (Standard and Sprint)

If the thought of completing all three disciplines at once is holding you back from signing up to one of our events, our multisport distances could be perfect for you! Perhaps an injury is preventing you from running, you can’t get your hands on a bike for this summer or the idea of swimming in the lake is just too much. We have created the multisport events to allow our competitors to compete in two disciplines of your choice within our triathlons. The same stunning courses tailored to suit you!

Junior Triathlon 9 - 16 years

From jumping in a lake, cycling through woodland trails or closed roads to running around the exciting castle grounds, we pride ourselves on offering unforgettable, accessible races for all abilities of 9–16 year olds at five amazing locations in England, Ireland and France. There are very few triathlon events where children, teens, and adults are able to participate at the same event making the most of these family friendly sporting festivals.

All junior cycle routes will be multi terrain and we strongly advise the use of off road tyres. See our take part page for Junior Triathlon Tips and hints.

Age group categories and distances have been adjusted in  to fall in line with BTF guidance.
TriStars 1 (9-10yrs 200m/4.2km/1.3km)
TriStars 2  (11-12 yrs 300m/4.2km/1.8km)
TriStars 3 (13-14 yrs 400m/8.4km/2.5km)
Youth (15-16yrs 500m/8.4km/2.5km)
I absolutely LOVED the new swim course! That was a fab alteration, and made the swim so much more interesting than most of the other swims you get at UK events. Will definitely be back to race next season, I think I may even take on the Iron distance event early season... We\'ll see!
Eli Thorogood

To compete in the Hever Castle Triathlon you can enter either as an individual, a relay team of two, or a relay team of three. The Junior and Children’s races follow the same format. Relay entries can be all male, all female or mixed.

Saturday 25th September 2021

Race Name
Race Distance
(Individual / Relay)
Discount Prices
(Individual / Relay)
Start time
Sprint Plus - Henry VIII
800m / 40km / 8km
£95 / £140
£86 / £126
750m / 20km / 5km
£90 / £135
£81 / £122
Duathlon Sprint (Run / Bike / Run)
4.2km / 20km / 2.5km
Aquabike Sprint (Swim / Bike)
750m / 20km
Aquathlon Sprint (Swim / Run)
750m / 4.2km
Super Sprint - Anne Boleyn
400m / 20km / 4km
£85 / £130
£77 / £117
Starter Tri - Castle Tri
200m / 15km / 2.5km
£70 / £110
£63 / £99
Children (9-10 yrs) Elizabeth 1
200m / 4.2km / 1.3km
£33 / £55
£30 / £50
Open water Swim
Open water Swim
Open water Swim
1 mile

*Hever 2020 was a socially distance event. The start timings for various Sprint events took place between 07:30 and 14:30. The Starter Tri, Children and Swim only events started between 15:00 and 17:00. If needs be, we shall follow a similar format at Hever. If social distancing is not required, all adults events will take place in the morning and Children events after 14:00.

Entrants will be notified of their start time via email 2 weeks prior to the event.  We advise that entrants arrive at least 1 – 1.5 hours before their given wave time.  Relays go off in the final wave of their distance.

Sunday 26th September 2021

Race Name
(Individual / Relay)
Discount Prices
(Individual / Relay)
Start time
Half Iron / Middle Distance - The Gauntlet
1.9km / 90km / 21km
£220 / £270
£198 / £243
Olympic / Standard - The Hever
1.5km / 40km / 10km
£110 / £150
£99 / £135
Duathlon Standard (Run / Bike / Run)
10km / 40km / 4.3km
Aquabike Standard (Swim / Bike)
1500m / 40km
Aquathlon Standard (Swim / Run)
1500m / 10km
HALF Marathon
10 km
Junior (15-16 yrs) - Elizabeth 1st
500m / 8.4km / 2.5km
£49 / £55
£44 / £50
Junior (13-14 yrs) - Elizabeth 1st
400m / 8.4km / 2.4km
£44 / £55
£40 / £50
Children (11-12 yrs) - Elizabeth 1st
300m / 4.2km / 1.3km
£39 / £55
£35 / £50

*Hever 2020 was a socially distance event. The start timings for the Gauntlet and various standard events took place between 07:45 and 13:30. The Children and Run only events started between 14:00 and 16:15 (the Marathon started at 09:00). If needs be, we shall follow a similar format at Hever. If social distancing is not required, all adults events will take place in the morning and Children events after 14:00.

Entrants will be notified of their start time via email 2 weeks prior to the event.  We advise that entrants arrive at least 1 – 1.5 hours before their wave time.  Relays go off in the final wave of their distance.

Course maps

Please take a moment to study these in details.

Hever Castle Triathlon is an exciting and busy event with lots of different courses taking place throughout the weekend. There will be a full brief before your race start but it’s a good idea to familiarise yourself with the course and in particular any key junctions to ensure you take the correct route.


Find the Races Results from previous years here.

If you have any queries please contact Stuweb Timing Solutions here.

Useful information

Race licence

The Castle Triathlon Series UK events are governed by the British Triathlon Federation and their technical officials will provide guidance on the day and in the run up to the event.

On race day, all  participants involved in a multi-discipline sport are required to produce a valid triathlon governing body membership card or purchase a Day Licence. The Day Licence must be purchased online prior to the event. Details will be sent out closer to the event.

Spectator Offering

The spectator experience at the Castle Triathlon Series has become almost as famous as the spectacular backdrops and classic courses, and has made passing time before your loved ones finish the race a thing of the past.

Competitor Photography

PRE-Race day offer! AWOL Adventure photography team will be positioned around the course, finish line, and event village ready to capture that timeless photo – Just don’t forget to SMILE!

Pre-order your digital bundle of pictures for a special HALF PRICE DISCOUNT. Here’s how it works…..

ALL your Digital Photos for for half price
Min. 2 photos GUARANTEED or your money back*
Bundle goes to full price after the event so hurry!

*Click here for quick FAQ and details of Awol Adventure guarantee

Rules and Terms and Conditions

Please read and understand the general rules, in particular the cut-off times, before competing to ensure a fantastic race for you and everyone else.

Travel, accommodation and directions to the venue

Click the link below to find out everything you need to know about all of our venues.

Trophies, prize money and medals

All competitors in all races will receive a medal on completion of their race.

Each 1st place winner will also receive a suitably themed trophy, and sponsor’s prizes for 2nd and 3rd place. There is a significant prize pot on offer for the Olympic and Gauntlet race distances.

Click below to find out more about what we have on offer.

Water quality

Please see the latest water quality tests for Hever Castle lake. All tests are undertaken using the EU Water Bathing Directive as the benchmark.

Water temperature

For swim length up to 1500m wetsuits will be optional on race day if the temp remains between 14 and 22 degrees centigrade and over 1500m swim length wetsuits will be options between 15 and 23 degrees centigrade.

Useful downloads:

Race distances

Race distances

For the absolute beginners and children to the professional triathletes, the Castle Triathlon Series offers a wealth of race distances to suit all levels.

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Hosted at a selection of stunning and iconic castles across the UK, Ireland and France, the Castle Triathlon Series events all promise an inspirational and memorable race experience.

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Take part

We pride ourselves on offering a bespoke and tailored offering for all those wishing to take part; from first timers, old timers, juniors, female focus, elites, tri clubs, corporates, there’s a race for everyone!

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Trade your time for a free race place! We offer a Volunteer Scheme, whereby a free race is given in return for a day’s marshalling at any one of the Castle Triathlon Series events. (terms apply)

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