Take Part

Enter for 2026

The CDF 10K will return for a special 40th anniversary celebration on Sunday 6 September 2026.

The race forms part of the R4W 10K Series, which includes races in Newport, Barry Island, Porthcawl and Cardiff.

Registration will open on 2025 race day, Sunday 7 September – available by clicking below.

*Please note a small non-refundable booking fee is charged on top of your registration fee by Let’s Do This, who manage our online registration platform. This is clearly broken down/itemised at the checkout page before payment.

10K Series Bundles

Planning on entering two or more of the races in the R4W 10K Series in 2026? A discounted Bundle offer is available for a limited time only, so runners are urged to register early to avoid disappointment!

There are savings of up to £24 available when entering multiple 10K events. Head over to the R4W website for more information on the series, multi-event passes, finishers items and prize money for elite athletes.

10K Series Bundles (offering savings when entering two or more races) for 2026 will go on sale on Thursday 11 September. Available on a first-come, first-serve basis – those keen to save are encouraged to sign up as soon as possible. Those who have joined the Waitlist ahead of the launch will receive a notification as soon as they become available.

What’s included in your registration fee?

🗺️ Race pack including spectator guide, race number and timing chip

🏙️ Fully closed road and marshaled, city centre route

🎵 Course entertainment and live music

🏅 An epic finishers medal to commemorate your achievement

♻️ Optional technical finishers tee or Climate Action Fund donation

🏃 Training advice and tips plus access to a free trial of the Coopah app

🎪 Access to event village, toilets and feed stations on route

📱Live tracking via the Run 4 Wales app and finish time SMS

⌚ Finish time pacers in every start wave

Run for Charity

Fundraising is at the heart of the CDF 10K – with many runners choosing to raise money for good causes. Running for a good cause will give a huge boost to the satisfaction you’ll feel on finishing the race – and keep you motivated during your training. We encourage runners to fundraise for Lead Charity Kidney Wales – but it’s up to you!

By accepting a charity place from Kidney Wales, you agree to the Kidney Wales terms & conditions.

Business Challenge

Fancy taking on the CDF 10K as part of a Team in 2026? Click below for more details on the Business Challenge.

Registration Deadline

Entries will close on 17 August 2025. Entries will close on this date (at midnight), or when they sell out – whichever comes first. If you have a space via a charity, team challenge package or sponsor you must register ahead of the deadline or you will be unable to participate.

Change your details or gift your entry

If you would like to make changes to your registration (address, predicted time, t-shirt size etc) or if you are no longer able to run and you would like to gift your entry to somebody else, you have until the booking edits deadline to make changes.

Full details can be found by clicking below or checking your confirmation email.

Terms of Participation

1. Participants must be 15 years of age or older on the day of the event.

2. When registering all participants must sign our terms and conditions.

3. Participants must complete the 10 kilometer course in less than 2 hours – our event cut-off time.

4. Names and/or video footage or photographs taken during their participation may be used to publicise the CDF 10K or other Run 4 Wales events.

5. Participant race numbers may not be passed on or sold to any other person. We offer a transfer service to all runners until the advertised transfer deadline.

6. Registrations will close on the date publicised on the event website homepage.

7. Participants must not be under the influence of drugs or alcohol.

8. Participants must be fit to run and free from injury

9. Under no exceptions can a participant collect their race pack after the designated time slots.