Nutrition Advice | Castle Triathlon Series | Castle Triathlon Series

Race Preparation

Nutrition Advice

Nutrition is often described as the fourth discipline of triathlon as it plays such a key role in helping you around the course, whether a sprint or full iron distance.

Nutrition advice

We are lucky enough to have some great partners who have a wealth of knowledge and products to share with you.

You will find water and feed stations stocked with High5 at all our events with nutrition and energy drinks provided to Gauntlet and full iron distance triathletes. Please see the Competitor Guides for full details.


High5 sports nutrition Castle Triahtlon Series


Do you want to enjoy your sport more? Combining a practical no-nonsense approach, rigorous testing by scientists in the lab and feedback from world-class athletes competing in the world’s toughest events, guarantees that you can rely on HIGH5 products to help you optimise your performance and enjoy your sport more.

The HIGH5 product range includes drinks, gels and bars: check out the full range here.

HIGH5 has developed step-by-step nutrition guides for each sport, race distance, race day weather and athlete body-weight. The triathlon nutrition guides are practical, easy to follow and ensure the optimum performance boosting intake of carbohydrate and caffeine. If you follow these guides you will race substantially faster and further:

BeetActive Performance Nutrition Castle Trithlon Series


Beetroots are a rich source of dietary nitrates. Supplementation with these can lead to a more efficient use of oxygen during energy production, ultimately leading to an increased tolerance to exercise.

Results from research examining a range of exercise modalities shows that consumption of beetroot juice can lead to a significant boost (5-15%) to endurance performance. BeetActive is a great tasting 100% natural beetroot concentrate, rich in dietary nitrates (229mg per serving). We recommend taking a 30ml serving of BeetActive diluted 250-500ml of water two hours before training or an event.

Can beetroot juice help get a PB?


CherryActive Recovery Nutrition Castle Triathon Series


CherryActive is an all-natural, antioxidant-rich cherry concentrate, proven to speed recovery and reduce soreness, after training.

CherryActive is the natural way to help all serious athletes get the most from their training week. Take 30ml of CherryActive with water, after your training sessions, and notice the difference in your recovery and performance!

Want to recover faster?

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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