Castle Howard | Castle Triathlon Series | Castle Triathlon Series

The Series

Castle Howard Triathlon

The Castle Howard Triathlon will finish a memorable July in style with a whole weekend of racing on the southern border of the North York Moors.

Read more:

Castle Howard Triathlon

Saturday 24th and Sunday 25th July 2021

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

The Castle Howard Triathlon will be the fourth weekend event of the Castle Tri Series and features the obligatory picture postcard backdrop and a course with something for every level of triathlete. Indeed, the 9,000 acre grounds of Castle Howard form arguably the most physically demanding triathlon course of the Castle Tri Series.

The weekend begins with the swim through Castle Howard’s Great Lake followed by 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.

220 Triathlon listed The Castle Howard Triathlon as a ‘must-do’ race.

Castle Howard Tri Festival

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.

Mixed Team Relay (including Yorkshire Championships)

We are delighted that this year the Senior Mixed Team Relay, the new format used in the commonwealth games, will be the Yorkshire Championship event. Taking place on the afternoon of Saturday 21st July, will see four person teams; two males and two females, each completing a 250m swim, 5km bike and 1.5km run as part of a tag team.

Mixed Relay has proven extremely popular with athletes of all standards and allows regular age groupers and more advanced athletes to race together. The minimum age requirement for athletes is 15 years. There is no upper limit upper age limit or ability for those taking part.

Go long for the Gauntlet

The Castle Howard event will witness the exciting return of The 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.

10K, Half Marathon and Marathon

Sunday 25th July 2021

With the growing success of the Castle Run Series since its conception in 2018, our Marathon, Half Marathon and 10K runs will be returning to the iconic Castle Howard.

This stunning and unique multi-terrain course will incorporate spectator friendly loops of the Yorkshire countryside, the Castle lake, quaint local villages and of course Castle Howard 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.

Castle Swim Series

Saturday 24th July 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 in all the stunning castle lakes.

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 Castle Howard 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.

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.

Ensure you bring the correct bike for your junior event at the Castle Howard Triathlon:-

On Saturday all junior cycle routes will be tarmac closed roads.

On Sunday 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.

Scroll down for age group categories and distances.

Thank you very much for the work you put in at Castle Howard. It was a fantastic event and I really enjoyed the location as much as the triathlon. Another wonderful weekend. We are looking forward to joining you in France, hopefully the weather will continue!
Jo Cockroft

To compete in the Castle Howard 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. Team entries can be all male, all female or mixed

Saturday 24th July 2021

Race Name
Race Distance
(Individual / Relay)
Discount Prices
(Individual / Relay)
Start time
Sprint Plus - The Brideshead Revisited
800m / 46km / 8km
£95 / 140
£81 / £119
750m / 23km / 5km
£90 / 135
£77 / £115
Super Sprint- The Brideshead
400m / 23km / 4km
£85 / 130
£72 / £111
Starter Tri - The Castle
200m / 13km / 2.5km
£70 / 110
£60 / £94
Aquabike Sprint (Swim / Bike)
750m / 23km
Aquathlon Sprint (Swim / Run)
750m / 5km
Duathlon Sprint (Run / Bike / Run)
5km / 23km / 2.5km
5km Swim
5 km
2.5km Swim
2.5 km
1 Mile Swim
1 mile
Youth (15-16 yrs) - The Garfield
500m / 8km / 2.4km
£44 / 55
£42 / £47
Junior T3 (13-14 yrs) - The Garfield
400m / 6km / 2.4km
£44 / 55
£37 / £47
Adult mixed relay
250m / 5km / 1.5km**
£120 (team)
£102 (team)
Family mixed relay
250m / 5km / 1.5km**
£75 (team)
£64 (team)

*We organised a socially distance event in 2020 for over 4000 participants at Hever Castle. 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 Howard. If social distancing is not required, all adults events will take place in the morning and Children and Mixed Team Relay events after 14:00.

Those participating in the Yorkshire Junior Series will be placed in the first wave of their age group. All Junior race events are non drafting. Saturday Junior cycle course is on full tarmac.

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 25th July 2021

Race Name
Race Distance
(Individual / Relay)
Discount Prices
(Individual / Relay)
Start time
Half Iron / Middle Distance - The Gauntlet
1.9km / 90km / 21km
£220 / 270
£187 / £230
Olympic / Standard - The Howard
1500m / 45km / 10km
£110 / 150
£94 / £128
Aquathlon Standard (Swim / Run)
1500m / 10.5km
Aquabike Standard (Swim / Bike)
1500m / 45km
Duathlon Standard (Run / Bike / Run)
10.5km / 45km / 6.5km
HALF Marathon
10 km
Junior TS2 (11-12yrs) - The Garfield
300m / 4km / 1.6km
£39 / 55
£33 / £47
Junior TS1 (9-10yrs) The Garfield
200m / 4km / 1.3km
£33 / 55
£28 / £47

*We organised a socially distance event in 2020 for over 4000 participants at Hever Castle. The start timings for the Gauntlet and various Standard events took place between 07:30 and 14:30. The Children and Run only events started between 15:00 and 17:00 (Marathon began at 09:30). If needs be, we shall follow a similar format at Howard. If social distancing is not required, all adults events will take place in the morning and Children 14:00.

**Distance varies slightly at each venue.

Those participating in the Yorkshire Junior Series will be placed in the first wave of their age group. All Junior race events are non drafting. Sunday Junior cycle course is multi-terrain and better suited to off road, cycle cross tyres.

Entrants will be notified of their wave time via email 2 weeks prior to the event.  We advise that entrants arrive at least 1 – 1.5 hours before their wave time.  There’s an option to request specific waves during registration.  Relays go off in the final wave of their distance.

Course maps

Please take a moment to study these in detail.

Castle Howard 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.

Race day Information

Two weeks prior to event, this section will give you everything you need to know about race day, including wave times, registration opening details, spectator entry, camping info and water temperature readings etc.

Results and photography

Find the Races Results from previous years here along with amazing shots of participant’s photography during the event.

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.

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

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.

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 and temperature

Please see the latest water quality tests for Castle Howard’s 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.

Find out more


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.

Find out more

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!

Find out more


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)

Find out more