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Henley TRi.png Henley Kids Tri 24.png

Henley Triathlon

Click here to enter

Date: Sunday 1st June 2025
Venue: Henley Leisure Centre & Gillotts School, Oxfordshire RG9 1PS
Swim: 25 metre Indoor Pool
Starts from:  0800hrs until approx 1300hrs
Sprint Distance: 400m swim - 25K cycle - 5k run 
Team Relay: 400m swim - 25K cycle - 5k run 
Super Sprint: 200m swim - 12.5K cycle - 2.5k run 
Fun Wave: 200m swim - 12.5K cycle - 2.5k run 
CRUK Wave & Relay: 200m swim - 12.5K cycle - 2.5k run Click here to enter CRUK Wave
Minimum Age: 16 Years (on race day)
The Henley Triathlon prides itself on its inclusive nature, welcoming athletes of all ages and skill levels. Novice triathletes find encouragement alongside seasoned professionals, creating a supportive environment that fosters personal growth and achievement.

Please Note: All Competitor Race Day Information (Individual Start Times, Bib Numbers, Full event info pack etc) will be emailed out to competitors 7-10 days before the event.


For more information, see the sections below:

The Event

Join us in our 16th year of this popular event taking place at Henley Leisure Centre and within the grounds of Gillotts School.

Swimming: The triathlon begins with a pool swim, where participants complete a designated distance in the controlled and safe environment of the swimming pool. This setup allows athletes of all swimming abilities to participate with confidence.

Cycling: After conquering the swim, competitors transition to the cycling stage. The cycling route winds through the scenic countryside surrounding Henley-on-Thames, offering both a challenging and visually captivating ride.

Running: The final leg takes participants to Gillotts School field for the run portion of the triathlon. The field provides an excellent running course, allowing athletes to showcase their endurance and determination as they approach the finish line.

Conveniently situated just outside the picturesque town of Henley, on the edge of the Chiltern Hills & the banks of the River Thames and boasting a spectator-friendly course, the Henley Triathlon is one not to be missed.

  • Leisure centre heated indoor pool swim
  • Rural Oxfordshire countryside bike course
  • Flat grass run course within the grounds of Gillotts School
  • Split transitions at the leisure centre and school playing field (see race day info for further details)
  • Commemorative finishers medal for every entrant

Do you have children that can't wait to become a triathlete?

Make a weekend of it and enter them in the Henley Kids Fun Triathlon on Saturday 31st May for 5-16 yr olds.

The Kids event has been over-subscribed for the last few years resulting in entries closing early, so be sure to avoid disappointment and book early.


At the Henley Triathlon our “Fun” and “Sprint” distances are very popular with first timers and beginners, with short achievable distances that still offer a challenge.

Our fun & friendly events are open to everyone and an ideal introduction for beginners to the sport of triathlon. The Henley Triathlon offers a supportive environment, with cheering crowds and a fun & relaxed atmosphere meaning everyone enjoys the day, competitors and friends & family alike.

We can offer lots of support and online beginners advice to help make your Triathlon the best it could possibly be for you. As well as a great atmosphere, you are sure to gain a special sense of achievement as you cross the finish line to receive that all important “finishers” medal and confirmation the end result was worth every bit of hard work!

CRUK Wave @HenleyTriathlon

CRUK text Henley.jpg

The CRUK Wave is aimed at encouraging more participants, of any age, gender or ability, to unite and take on a challenge for the purpose of funding life-saving research into all 200 types of cancer.

This change comes after the success of the UK Triathlon Pink Wave, it reflects the movement towards a more inclusive environment for all participants who want to complete a triathlon at their own speed, whilst raising money for life-saving research.  

We want to encourage everyone to have a go! Any age, any ability, just get together for the camaraderie and challenge, whilst raising vital funds for research into beating cancer.

UK Triathlon will donate £10 from every CRUK Wave entry to Cancer Research UK. Cancer Research UK is a registered charity in England and Wales (No. 1089464) and Scotland (No. SC041666)


More information about your race

Please take some time to read all the event information, it will make it far more enjoyable for you and reduce the need to ask questions on the day. Good luck and have a great day!

Race Day Information 2024 - Please Click Here

You can use this information as a guide for your event. Full and up-to-date 2024 competitor race day information with your race number and start time will be emailed to you 7-10 days before the event.

WE DO NOT POST ANYTHING OUT - you will collect your race numbers and stickers at registration on the day.


Trophies awarded for top 3 in each category, as well as the 1st place in every age group. Official medal awarded to every finisher

Super Sprint

Trophies awarded to first place in each category. Official medal awarded to every finisher

Fun Wave

Non-competitive, official medal awarded to every finisher.

Cancer Research UK Wave

Non-competitive, official medal awarded to every finisher. £10.00 from your entry fee will go directly to CRUK.

#tritogether Wave

Non-competitive, official medal awarded to every finisher

Unfortunately due to the venue being a school playing field, no dogs are allowed on the site.

Course Maps

The swim discipline takes place from the indoor swimming pool followed by the cycle course which is flat with some undulations and takes in many fields and trees in this rural route through the Oxfordshire countryside. The final run discipline is on grass around the picturesque grounds of Gillotts School.

PDF Documents: click each to open or download

Transition 1 Setup

Bike Course - Start & Finish

Bike Course - Mount Line

Run Course

Bike Course

To view course direction & distance markers, please click on, “view full version” (top left-hand corner of the map) or run your mouse cursor along the mountain graph to see course direction.


2024 Results - Provisional

 For result queries please email [email protected]


Event Photos


Ideal novice Sprint triathlon

Really nervous doing this as it was my first, out of the 14 in my briefing group all of us were novices! The event was well organised and welcoming, not too big or scary. Loved the bike course in the sunshine, the run was hard work in the heat!

Sarah Stevens


Hi Julie and team at UK triathlon

Thank you fororganising a really great event and especially thank you to thevolunteers.Every was so encouraging andcheerful - I thoroughly enjoyed myself and hope to be be back next year!

Best wishes, Sue Jack


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Entry Form

Henley Triathlon 2025 Early Bird Sale

On Sale: £60.00 was £89.00

(Price per race entry or per relay team)

The price will adjust automatically when event is selected.

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Want to take part with a friend or family member?

With #TriTogether you can swim, cycle & run together as part of a friendly wave.

The idea behind #TriTogether is that people often feel more comfortable taking on a challenge like a triathlon if they have a friend to take part with. 

We want to encourage everyone to Tri, be that competitively or simply just for the fun of it.

How to Join

To join the #TriTogether wave, once you & your Friend have submitted your entries, please fill in the request form below, & we will add you both to the friendly #TriTogether wave.


Telephone Entry

If you would prefer to enter over the phone please call

01270 842800 and secure your place today!

(Lines are open Monday to Friday, between 9:30am-3:00pm).

Transgender policy
Only people who are female sex at birth are eligible to compete in the Female category.
All individuals including transgender people are eligible to compete in the Open category. Responses to this question will enable us to allocate competitors into the correct race category as required under the British Triathlon Transgender Policy effective 1 January 2023. This policy can be read here and provides more information regarding race categories and eligibility.
For any queries about the transgender policy, please email [email protected]