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Cardiff Half Marathon

Run 13.1mi
Event details


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With 20,000+ participants, put this race in your diary as a must-do event. The mostly flat course is packed with supporters throughout and you'll run past Cardiff Castle, Penarth Marina and Cardiff Bay. Come for the festival vibes, finisher's medal and technical t-shirt.
C-19 Plan
Run4Wales has confirmed that this event will be going ahead as planned on Saturday 2nd Oct 2021 in accordance with the COVID-19 safety measures. Learn more

Review summary

16 Reviews
  • Course
  • Organisation
  • Atmosphere


Lucia C
"I have run this event since 2014. Fantastic crowds. Best part is running..."


Stuart W
"Parking was simple and only a short walk away, the bag drop, charity village..."


Jo B
"Great atmosphere, though the crowds getting to the race then the finishing and..."
See all reviews

How to enter the Cardiff Half Marathon

  1. Half Marathon

    Run 13.1mi

Cardiff Half Marathon route

This route is the perfect tour of Cardiff, taking runners past the city's most iconic landmarks, beautiful scenery, and historic buildings.

The predominately flat and fast course makes this an ideal event for beginners and elites.

The Half Marathon starts outside Cardiff Castle and travels down past Cardiff City Stadium on the way to Penarth. Runners will get to take in the glorious Penarth Marina before crossing the barrage and heading to Cardiff Bay. The route takes runners right through the heart of the bay, taking in the Norwegian Church and Wales Millennium Centre along the way.

The route's last leg takes runners north of the city, to run around the stunning Roath Park Lake before getting their photo finish back in the heart of the city.

Event Details

  • Chip Timed Event
  • Finisher's Medal
  • Finisher's T-shirt
  • Marshalled Course
  • Water Stations
  • Aid Stations
  • Post Race Goody Bag
  • Hoka One One Pacers


08:30 Bag Drop opens

10:00 Half Marathon Starts

11:30 Prize Ceremony Starts

14:30 Cut-Off Time

Runners will be set off in a staggered start, with Red, White, and Green runners starting at 10am, and Blue and Yellow runners starting at 10:10am.

Spectators are more than welcome and help lend to the superb atmosphere of this event.

With thousands of supporters coming out each year, a dedicated spectator zone, and excellent standing terraces, this event is just as special for spectators as it is for runners.

Make sure to arrive in plenty of time to grab the best spot to watch your athlete cross that finish line!

Volunteers are essential in ensuring the successful running of the Cardiff Half Marathon.

With a number of different opportunities on offer the 'Extra Milers' has something for everyone:

  • Start/Finish Steward
  • Course Marshal
  • Volunteer Photographer
  • Race Guru
  • Baggage Support
  • VIP Support
  • Water Station Support
  • Environmental Champion

Volunteers will be given a uniform and refreshments on the day to compensate for their hard work!

If this is something you might be interested in please visit:

Frequently Asked Questions

What is the cut-off time for the Cardiff Half Marathon?
To ensure roads open again and limit impact to the city, the cut-off time for the Cardiff Half Marathon is 4.5 hours. Runners falling behind this pace can be picked up by the sweeper vehicle or continue along the pavements.
What is the minimum age to take part in the Cardiff Half Marathon?
Participants must be 17 years old on race day to enter the Cardiff Half Marathon.
When will I receive my race pack for the Cardiff Half Marathon?
This will be sent to you in the post 1-3 weeks before the event.
What times will the pacers be running at the Cardiff Half Marathon?
The Hoka One One Pacers will be running at the following paces: 1:30, 1:45, 2:00, 2:15, 2:30, and 3:00. They will be holding sail flags corresponding to each of these times and are a friendly group.
Where can I purchase my race photos from the Cardiff Half Marathon?
All race photos can be purchased from the events official photographers Marathon Photos, and will be available 2 days after the event.

Meet the organiser

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Run 4 Wales delivers a series of high profile elite and mass participation sporting events in Wales including the Cardiff Half Marathon, Newport Wales Marathon, VELOTHON Wales, Cardiff Bay Run, Barry Island 10K and the Royal Welsh Trail Running Festival.


Cardiff Half Marathon reviews (16)

4.9 out of 5 stars

  • Course
  • Organisation
  • Atmosphere
  • Did the Half Marathon in 2019

    I have run this event since 2014. Fantastic crowds. Best part is running across the barrage. Even through the hailstones during the world half marathon. Flat for most of the way, so I get my best times.
  • Did the Half Marathon in 2019

    Great atmosphere, though the crowds getting to the race then the finishing and getting away from the race were somewhat testing 😬 was just for short while though. I wouldn’t recommend this for a person best because there were simply too many runners.
  • Did the Half Marathon in 2019

    Great easy course (well as easy as a flat marathon is), great atmosphere at the event and in town during/after, I did my PB there which I was not expecting/trying to do...Just need to watch out for a steep little hill at mile 12 best know its there and power up it, its not a long one.
  • Did the Half Marathon in 2019

    Great event for any type of runner. Amazing support all the way round! Already signed up for 2020. 👊👊
  • Did the Half Marathon in 2019

    Great course and atmosphere as always. Liked the route on back of the medal and T-shirt is a fab design this year. xsmall T-shirt are still too big. The gel stand could be laid out better perhaps on both sides as I always miss it every year.
  • Did the Half Marathon in 2019

    Definitely worth doing and staying over if you can. The atmosphere was electric and the support was superb! Not boring at all so many landmarks ! I think my favourite section was the run across the barrage, absolutely stunning. I wouldn’t say it was flat as there was a very cheeky hill at mile 12 and this didn’t help my time. So no not a P.B course but that is my only criticism. Definitely one for your diary x
  • Did the Half Marathon in 2019

    Parking was simple and only a short walk away, the bag drop, charity village andvbstart line were a bit hectic but we'll sign posted. A serious lack of toilets but understandable with over 50000 people attending. The course was a lovely route with a couple of small inclines. Marshals & volunteers were awesome, the crowds and support were penominal from start to finish. Finish line was okay as finish lines go, goody bag was reasonable, I like the t-shirt, loved the medal with the course printed on the back. A nice touch and a real winner with me was the free pint and 25% off food at any of the Brains brewery pubs.
    I will be back to run the Cardiff half marathon and I would highly recommend it to first timers and PB seekers.
  • Did the Half Marathon in 2019

    My favourite half so far out of several. Crowds on the whole route. Music. Predominantly flat course taking in the whole city, lots to keep you interested. Easy to get into the city and park. Easy to get into pens. Frequent water stations. Last km slightly downhill which is always nice :) Just brilliant really I'd highly recommend
  • Did the Half Marathon in 2019

    2019 was my fourth Cardiff half and it is a race I keep returning to because it has a great atmosphere, is well organised and parts of the course, particularly around Cardiff Bay and the barrage, are lovely. This year the weather held and so the support was incredible, the entire course had people willing you on. Because there are such large numbers, the start is a bit busy and it takes a while to move around the event village and get to your pen, particularly the front ones, as the start approaches. Given the scale of the event, the organisers do a great job. Already signed up for number 5 next year.
  • Did the Half Marathon in 2019

    This was my 8th half marathon and first time at Cardiff and it is easily the best organised half I've done. The staff and volunteers were amazing and the course takes you on an amazing your of Cardiff. I loved it so much I've already signed up to the double distnace Cardiff half and Newport marathon for 2020!
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