Pop-up City Triathlon

Lough Cutra Castle
26/27 May 2018

Cholmondeley Castle
23/24 June 2018

The Festival of Endurance at Hever Castle
8 July 2018

Castle Howard
21/22 July 2018

Château de Chantilly
25/26 August 2018

Hever Castle
22/23 September 2018

Schools Roadshow
July 2018

Online Shop

Castle Triathlon Series Merchandise

NEW merchandise range!

Check out our new range of merchandise including base layers, t-shirts, hoodies and much more.

Medal inserts

Get your times on your medal after the event

You can personalise your well deserved race medal with a medal insert, showing your name and overall timing.

These will be posted to you after the event.


Camping at the Venue

Why not enjoy the unique experience of camping in the castle grounds to complete your tri weekend break?

Wetsuit hire by 2XU

Want to buy? – checkout full 2XU range here.
Want to try before you buy on your next wetsuit? 2XU will be offering a 2018 season hire option on their new upcoming 2018 “Propel P:1” wetsuit. Event weekend, monthly and seasonal hire options available from just £25 and if you decide to keep your suit the rental fee will be taken off the purchase price! Full details of the scheme to be launched early 2018.

Group bicycle and event fee cover insurance, what’s this all about?

Our event day insurance has been created by the team at Yellow Jersey Insurance to cover your race day. Our group policy, if you opt-in, covers you for the re-imbursement of your event entry fee should something unforeseen prevent you from participating (e.g. a new injury). The group policy also covers bikes on the day of the event for damage whilst racing and theft from transition (including overnight).


All the performance at 1/2 the price!  Wheelscience offer you unbeatable performance at an unbeatable price.  With their “direct to consumer” business model you get all the quality and speed gains of the bigger brands, without the price tag.  The Wheelscience team are always happy to answer questions, or offer advice on wheel selection, so make sure you drop them a line!

Free shipping anywhere in the world and Castle Triathlon Series competitors can receive 10% discount with code: CTSWS1018.

British Bike Hire

Bike hire

Hiring a bike takes the hassle of transporting your own to each event leaving you free to enjoy some well earned rest and recuperation after your ride.

British Bike Hire are the official Bike Hire Partners of the Cholmondeley Castle Triathlon, the Castle Howard Triathlon, and the Hever Castle Triathlon.

Six Physio Advice

This multi-discipline sport can mean more injuries and niggles, so book a tri-screening at one of Six Physio’s London clinics or Ask the Guru for immediate personal advice here. Call Six Physio and quote code CTS20 to receive 20% off Initial Physio appt (1hr), massage or Sports Assessment.


Support our Charities

Please support our National and Local Charities and make a donation online.


Being prepared will get the most out of your event day. TheTriLife offer an invaluable array of training advice including preparation days at the castle venues, specific training plans tailored to your distance and membership to their very affordable training club.

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 and grateful for all those who want to be involved on the day.

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We would always recommend training in preparation for any event, but how much you do, and the style you take is down to you.

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