Race Preparation

We have partnered with experts in tri gear to help you kit yourself out for race day, whether through hiring or purchasing.


We advise participants of the water temperature in the run up to each event.  Basically, if it is over 15C and under 23C it is wetsuit optional.  Regardless, we would recommend the use of a wetsuit if you are new to open water swimming and/ or a weaker swimmer.  Both shorties and full-length wetsuits are acceptable but should not exceed 5mm in thickness.  Please note that a triathlon-suit is not an alternative to a wetsuit.

Help make that transition from swimming pool to open water with Outdoor Swimmer’s guide to “Escape the Pool”

All of our adult  and junior (13-15 year olds) cycle routes* are on closed roads and as such, we recommend that you hire or buy a road/ racing bike (this includes lightweight hybrid types as we know that not everyone gets on with drop handlebars!) for your race.  This said, we have many a fine  participant who use their mountain bike (heavy) and we have even seen a bike with a kids seat still affixed to the back of it!

The children’s (8-12 year olds) cycle route always takes place within the Castle Estate boundary and as such off the public road and free of traffic.  We recommend mountain bikes although some use a cyclo cross bike (effectively a racer with off-road tyres). The courses encompasses a complete mix of terrain but not too technical (e.g. no bunny hopping logs or super steep descents).

Cycle helmets are compulsory for all.

All running routes are off road and depending on conditions under foot can require a trail type running shoe.  If you only have normal running shoes you will also be fine but just won’t get the sort of traction the super fast guys and girls get as they hurtle around the course.

*The Junior Cycle route at Hever Castle in September is off road and includes 2 laps around the estate on a variety of surfaces including grass, track, tarmac and gravel.

Equipment Checklist

You will need:
  • Transition box/bag
  • Wetsuit
  • Goggles
  • Towel
  • Cycling shoes & socks (If wearing)
  • Tri suit or shorts and t-shirt
  • Bike
  • Cycle helmet
  • Trainers (some routes require trail shoes)
  • Nutrition
  • Water bottle
  • Race belt

We provide you with a swim cap.



We’ve partnered with KitBrix, the number one Triathlon organiser bag, to work towards the common goal of helping athletes be prepared to achieve their best performance. KitBrix create innovative and inspired organiser systems for triathletes which are built with one, unfussy purpose in mind: to save you time, enabling you to perform at your best.

Castle Triathlon Series athletes can buy KitBrix with a 20% discount using code: CTS20%. SHOP KITBRIX HERE

Bike hire castle triathlon series

Bike Hire

British Bike Hire are the official bike hire partner for the Castle Triathlon Series.

Hiring a bike with British Bike Hire takes the stress and hassle of traveling with your bike out of race weekend; you can rely on them to have a freshly cleaned and serviced bike delivered to the event ready for collection. Once there you can collect your bike from one of their team of mechanics who will be on hand for any fitting adjustments, pedal changes or installation of extra parts that you may want.

The process is simple:
1.       Book your book online at
2.       You’ll receive a confirmation email and then information about the event in the week leading up to it
3.       Arrive at your Castle Triathlon event and find your bike ready to ride in the event village
4.       Do your event!
5.       Drop it off at the end of the day when you’re finished

You can choose from their wide range of bikes from carbon road bikes at £75 for a single day hire, to hybrid bikes for £40 for a day hire.

Junior equipment

So, what gear do you need?

Here is a list of the key items; if you don’t have them already you can either buy or hire them from our retail partners.

  • Wetsuit (all Castle Triathlon Series events are in open lakes so temperatures can get pretty cold).
  • Swimming goggles
  • Swim hat (all competitors get a free hat on the day of the events)
  • Bike (mountain bikes are ideal)
  • Helmet
  • Trainers
  • Elastic or lock laces – to tie up your trainers quickly
  • Tri-suit or shorts and t-shirt are fine
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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