Cardiff Half Marathon

Run 13.1mi

Top tags:

Friendly atmosphere


Good for beginners

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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

3 Reviews
  • Course
  • Organisation
  • Atmosphere


Alice O
"A really great event, loads of other runners and plenty of water stations...."


Jay H
"Absolutely brilliant race and awesome atmosphere. No matter where you were on..."
See all reviews

Distances in this event

  1. Half Marathon

    Run 13.1mi
    Entry Closed

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

  • Road
  • Flat
  • Finisher’s medal
  • Closed roads
  • 25000 participants

From the organizer


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Run4Wales are ranked #78 in the UK out of 506 organizers

Join our Cardiff Half Marathon team and 18,000 others in a race through the Welsh capital. The Cardiff Half Marathon has grown into one of the largest road races in the UK, taking you through the beautiful scenery and historic buildings of the city centre.

The route will take you past some of the Welsh capital's most iconic landmarks, with stunning scenery and beautiful buildings. Along the way you will pass the glorious Penarth Marina before crossing the barrage and heading to Cardiff Bay, where you will run right through the heart of the bay taking in the Norwegian Church and the Wales Millenium Centre.

The flat roads along this course make this the perfect race for experienced and novice runners alike.

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

    Drizzle throughout the day.

    Predicted highs
    Predicted lows
    IconHigh chance of rain
    IconLight breeze possible, up to 9mph

    Cardiff Half Marathon reviews (3)

    5 out of 5 stars

    • Course
    • Organisation
    • Atmosphere

    Reasons people recommend this event

    Friendly atmosphere


    Good for beginners

    • Did the Half Marathon in 2018

      A really great event, loads of other runners and plenty of water stations. Would recommend not just accepting the lucozade because it's free if you haven't trained with sports drinks. I felt very sick! Not much incline, great route taking out over the barrage to see both the bay and Bristol Channel.
    • Did the Half Marathon in 2018

      Absolutely brilliant race and awesome atmosphere. No matter where you were on the course there was always an abundance of support, from the handmade signs, to high fives, to handing out jelly sweets. Course was relatively flat with only a few gradual hill climbs. Best part of the race would probably be running through Cardiff Bay, the views were great. Definitely recommend especially for those who are first timers to a half marathon, there are people of all caliber who run it.