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Cardiff Half Marathon

Run 13.1mi

Top tags:

Stunning scenery

Friendly atmosphere

Incredible crowds

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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.

Review summary

15 Reviews
  • Course
  • Organisation
  • Atmosphere


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..."


Sean H
"Great easy course (well as easy as a flat marathon is), great atmosphere at the..."
See all reviews

How to enter the Cardiff Half Marathon

  1. Half Marathon

    Run 13.1mi
    Event passed

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Cardiff Half Marathon route

The route takes runners past the capital’s most iconic landmarks with beautiful scenery and historic buildings. The predominately flat and fast course makes it ideal for beginners and elites.

The race starts outside Cardiff Castle and runners then head down past Cardiff City Stadium on the way to Penarth. They take in the glorious Penarth Marina before crossing the barrage and heading to Cardiff Bay. Runners run right through the heart of the bay taking in the Norwegian Church and Wales Millennium Centre.

The course then heads towards the north of the city and runners will complete a loop of the beautiful Roath Park Lake before the grandstand finish in the heart of the city at the Civic Centre.

Event Details

What’s Included

What’s Included in Your Registration Fee –

Event pack including information booklet, running number and timing chip

  • Helpful training advice and support
  • High quality medal to commemorate your achievement
  • Commemorative technical finishers t-shirt
  • Access to the event facilities, including toilets
  • Water, sports drink and energy gels available along the route
  • Opportunity to win cash and voucher prizes, including fancy dress prizes
  • A text post event with your race time (if you have supplied us with your mobile number)
  • Use of a live tracking app
  • Predicted finish time pacers in every start wave
  • A post-race goody bag
  • Age Criteria: Half marathon entrants must be 17 years or older on the day of the race. Younger runners can take part in the Family Fun Run and Toddler Dash as part of the Festival of Running on Saturday 5th October.
  • Raceday Logistics
  • The race starts outside Cardiff Castle on Castle Street at 10am. The race will finish on King Edward VII Avenue. The race village is at City Hall Lawn outside Cardiff’s City Hall.
  • Each runner will be able to store one bag. The exact location of the bag storage facilities will be printed in the race brochure which will be sent to you in your runners pack.
  • Baggage AreaThe baggage tents will be open at 8.30am. They are located on Museum Avenue and in the museum car park near the Runners’ Village. Please refer to the village and baggage map in this brochure for an exact location. All runners are allowed to deposit one bag which must display your baggage label, which is a tear-off strip on the bottom of your race number. Please attach the label before your arrival. Bags can be collected after the race upon receipt of your runner number. Only runners and staff will have access to this area which will be manned by security staff who may ask to check your bags.Items not collected after baggage closure will be held at the Event Information tent in the Runners’ Village. The following day they will be taken to the Run 4 Wales offices.
  • Spectators


    When watching the race please be aware of the course and stay behind barriers at all times. Crossing points will be managed throughout the course, but when none are available, please take great care in not crossing in front of runners and cross when there are no runners on the road. There are a number of brilliant locations around the route to watch the race, but please take care at all times.


    he race relies on volunteers acting as stewards and giving out drinks and medals every year. If you’re not running it’s a great way to ensure the event is a success and helps raise lots of money for charities to continue doing their vital work. If you’re a student it’s also great experience to put on your CV and a fun thing to do with friends. To find out more please email [email protected]

    Frequently Asked Questions

    At what time does the Cardiff Half start?
    The start time is 9:50am 6th October.
    What is the cut-off time for the Cardiff Half?
    The cut off time is 4:30min.
    What is the minimum age to take part in this race?
    The minimum age to take part in this race is 17 years old
    When will I receive my race pack for the Cardiff Half?
    This will be sent to you in the post 1-3 weeks before the event.
    Have a question? Get answers from our team.

    Cardiff Half Marathon weather forecast

    Possible drizzle in the morning.

    Predicted highs
    Predicted lows
    IconHigh chance of rain
    IconModerate breeze possible, up to 13mph

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    Cardiff Half Marathon reviews (15)

    4.9 out of 5 stars

    • Course
    • Organisation
    • Atmosphere

    Reasons people recommend this event

    Stunning scenery

    Friendly atmosphere

    Incredible crowds

    • 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!
    • Did the Half Marathon in 2019

      Fantastic day, first time in Cardiff and me and the family used the parking at the stadium and walked in. Would come back again.