Spring is here…so let the season commence
Spring is in the air – which means race season is almost here! We’re back with a thrilling lineup of events, featuring iconic locations, scenic courses, and unforgettable race day experiences. Whether you’re a seasoned triathlete, a duathlon enthusiast, or looking for a fun family challenge, we’ve got the perfect event for you.
Secure your spot now and experience a race like no other, with breathtaking scenery and a festival-style atmosphere that makes it the perfect weekend getaway for athletes and spectators alike.
We’re always looking to improve at Castle Race Series, and that includes understanding what matters to you. We’ve partnered with MBA students from the University of Manchester to research the impact of ESG (Environmental, Social, and Governance) initiatives in mass participation sports. Share your thoughts on sustainability, social impact, and governance in this short anonymous survey. Your input will help shape future events and support the students’ research.
Our Competitor Guide for the 2025 season is now live, giving you all the information you need to know about your event.
Upcoming Events:
Lough Cutra Castle – 24 – 25 May
Château de Chantilly – 7 – 8 June
Cholmondeley Castle – 21- 22 June
Belvoir Castle – 19 – 20 July
Hever Castle – 27 – 28 September
Your next adventure starts here!
Race for a Reason
Join Team Alzheimer’s Research UK racing at any Castle Race Series venue with a registration fees starting at £10 and fundraising pledges from £200.
By racing with Team Alzheimer’s Research UK , you’ll be helping to fund vital dementia research while enjoying some of the UK’s most spectacular multisport events.
£10 Off Castle Run Series – Limited Time Offer!
Lace up and save! For a limited time, enjoy £10 off entry to any Castle Run Series event (excluding the 5K at Chantilly) with code RUN10 at checkout.
Whether you’re chasing a new PB or running for fun, experience stunning courses, epic scenery, and unbeatable race-day vibes.
Don’t miss out – offer ends soon!
Make It a Family Affair!
Our family-friendly events are the perfect way to introduce your loved ones to the joy of racing. With junior races for those 9-16, and plenty of fun activities off the course, the Castle Race Series is a weekend the whole family will love.
Get inspired by our latest blog on family-friendly race experiences.
New to Multisport? Try a Duathlon!
Not ready for the swim? No problem! Our duathlon events offer an incredible challenge with run-bike-run formats, perfect for both beginners and seasoned athletes looking to mix things up.
Check out our latest blog to discover why duathlon might be the sport for you.
SCIMITAR OFFER: WIN £500 FOR YOUR TEAM!
Enter Scimitar’s £500 Club Giveaway for a chance to win big!
Simply click the link and complete as many actions as possible — more actions = more entries!
Don’t miss out—the deadline to enter is April 30th!
Tri Training Harder Coaching Plans
All athletes chase success, but often, it is how they set themselves up that can make the difference. Put the right foot forward first, use one of their training programmes, and ensure you have the best chance at our race weekends.
GOGGLE UP!
SWANS has over a century of expertise in designing and manufacturing high-quality swim goggles for all levels – from beginners to elite athletes.
Upgrade your 2025 swim with SWANS goggles and dive into your best season yet!
Use code CASTLE20 at checkout for 20% OFF SWANS UK goggles.
Share Your Swims With Caribbean Wildlife
Where else in the world can you swim with dolphins, turtles and pigs too? That’s right, our upcoming Bahamas trip takes you to meet the swimming pigs of Piggyville on No Name Cay! Explore the Abacos island chain and discover settings used in the ‘Pirates of the Caribbean’ franchise.
Read our interview with SwimTrek’s Managing Director, Ash, fresh from his recce in the Bahamas.
As a member of 1% For The Planet, SwimTrek are committed to giving back 1% of their sales (not profits) to environmental causes.
What causes dementia?
Alzheimer’s Research UK: Most dementia cases result from a complex mixture of factors.
Age and genetics are the biggest risk factors, but research suggests almost half of dementia cases are linked to risk factors we can control.
Find out more about what causes dementia and the steps we can take to reduce our risk.
Introducing Pelotan – Performance Sun Protection, Backed by Champions
Summer is coming, and so is the sun. That’s why we’re excited to introduce Pelotan, high-performance sunscreen trusted by elite athletes—including Olympic and IRONMAN champions Kristian Blummenfelt and Gustav Iden, who are also investors in the brand. Lightweight, water and sweat-resistant and designed for endurance, Pelotan helps you go further, protected.
Wetsuit Hire - Season Hire
Hiring a wetsuit offers open water swimmers’ choice, is more affordable and offers a sustainable option.
Buying a wetsuit can be a big investment especially if you are not sure if open water swimming is for you or you are not sure of the size or fit. Hiring a suit from Tri Wetsuit Hire means you can try your wetsuit out in the water and check how it feels swimming in it. If you then love your suit, you can buy it
Event day insurance is here!
Heads up! Have you seen that our official event partners, Yellow Jersey insurance, are offering event fee and crash damage insurance on all of our events?
Better still, the policy only costs from £5 per person! Just tick the event insurance box when entering and that’s it, all done!
RCS Business Messaging from BulkSMS
Transform your customer communication with RCS messaging! Deliver rich, interactive experiences using images, carousels, and action buttons- all within the default messaging app.
Engage your audience like never before with personalized, dynamic content.
Ready to transform your messaging strategy?
We need you to join our crew!
We are looking for marshals for all our 2025 events. Our Trading Places Scheme means you (family member or good friend of yours) can marshal one day, and race for free the other! Offer includes free camping and great behind-the-scenes experience.
Might this be you?
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