We are delighted to attach our comprehensive Competitor Guides and highly recommend that you read! Click the images to download.

PRE-Race day Registration

Friday 23rd and Saturday 24th : between 17.00 – 18.00.  For those who want to pick up their pack before race day and avoid the morning queues! These are strict opening times. There is no overnight bike racking facility. Please arrive with all the correct documentation. It is not possible to pick up a race pack for someone else.

Race Day Registration

We will register competitors in wave order.

Triathlete and multisport please arrive at the registration and licence tent 1.5 hours before your given wave start time .

Swim only and Run only please only arrive at the registration tent about 1hr minutes before your given wave start time .

Registration opening times

Saturday 24th August
Sprint Races: 07:30 – 10:15
Swim only: 10:00 – 11:00
13-15 years: 12:15
11-12 years: 12:30
8-10 years: 12:45
Mixed Relay: 13:30

Sunday 25th August
Gauntlet:  06:30
Olympic:  07:00 – 09:00
Multisport:  08:00 – 09:30
Marathon:  10:00
Half Marathon:  10:15
10K:  10:30

Water Temperature was 18C as of 8am on Wednesday 22nd August.

If you haven’t already, now is the time to really get to know your courses. Please take a moment to study these in detail.

Chateau de Chantilly Triathlon is an exciting and busy event with many different races taking place throughout the weekend. There will be a full brief before your race start but it’s important to familiarise yourself with the course and in particular any key junctions to ensure you take the correct route.

To all Run Series participants; please collect your race bib (with timing chip attached) from Registration 1hr before the start of your race. Please don’t forget your medical certificate if you are not a competition licence holder.  Changing facilities and bag drop are located near the bike transition area on the top terrace. The run start is located on the lower terrace , look out for the Start Arch! Race Briefing will take place here 15 minutes before your start time.

Prize giving ceremony will be on the stage approx 1.30pm and 3.30pm for the Marathon.

To all long swimmers; please collect your timing chip and swim hat from registration 1hr before your start. Please don’t forget your medical certificate if you are not a competition licence holder. Changing facilities and bag drop will be located on the top terrace by the bike transition area. The Race Briefing will take place at the water’s edge, 15 minutes before your start time.

Prize giving ceremony will be on the stage (approx 1.30pm) for Wetsuit or Non-wetsuit categories

Preorder your Official Photos!

ALL Your Official Digital Photos for just £15 if you buy now – post-event price £30 so order now… Offer ends midnight Friday 23rd August.
Working with Castle Triathlon Series, we are offering professionally-taken event photos at an extremely competitive price. We will have professional photographers stationed all over the course, finish line, and photoboard ready to capture that timeless photo.

If you plan to use the HIGH5 products on race day, we recommend you try the products in training first. Step up your training with the Castle Triathlon training nutrition bundle and get 40% off with coupon code TRAINCASTLE. HIGH5 are committed to creating nutritious products with amazing natural flavours and are passionate about helping you achieve your goals – however big or small. Use below links for your bespoke option.

The HIGH5 product range includes drinks, gels and bars.

Allovelo Bikes is located in Paris and will be providing bike hire for the Chantilly Triathlon event. Please call or visit their website to book and pay for your bike hire, then simply pick it up from the event. Allovelo will be located by the Transition area.

Call Allovelo on: 0033 1 40 35 36 36
Email: allovelo@gmail.com

Supporters are required to present a Spectator Ticket to gain FREE entry. The spectator ticket download link can be found on recent competitor communications. Without a spectator ticket, an entry fee will be charged by the Venue

A supporting adult of a child participant in 8-15yrs races, can gain free entry just by showing the Booking Confirmation email (in this case NO Spectator Ticket is required).

• Do you know your wave start time, seen your name on the list?
• Have you downloaded your free spectator tickets needed for entry?
• Have you got a copy of your Booking confirmation to gain entry?
• Your photo ID
• Is your race documentation in order? –  Membership Card or Competition Day Form printout and proof of purchase confirmation email. Medical Certificate if necessary. Parental Consent if necessary
• Have you studied the course maps and happy with the routes?
• Remember to leave plenty of time to park and registration aiming to arrive 1.5hrs before your start time.
• It’s advisable to bring cash to the event.