The Cardiff Half Marathon is one of the largest and most popular running events in the UK, held annually in the heart of Cardiff, Wales. The race offers a fast and scenic route that takes participants past iconic landmarks such as Cardiff Castle, the Wales Millennium Centre, and the beautiful Cardiff Bay. Known for its vibrant atmosphere and excellent crowd support, the event draws runners from around the world. With race options for all abilities, including charity runners and elite athletes, the Cardiff Half Marathon has become a key fixture in the UK running calendar, providing a memorable experience for all who take part.
Race
Half Marathon
Race Date:
05 October, 2025
The Cardiff Half Marathon offers a fast, flat course through the vibrant streets of Wales’ capital, passing iconic sites like Cardiff Castle and Cardiff Bay. Organized by Run 4 Wales, this event, held on October 5, 2025, draws thousands of runners from across the globe for an unforgettable experience.
Weather based on historical averages. Route data provided by Strava, based on last year's race.
FAQs
What is the Cardiff Half Marathon?
How long is the Cardiff Half Marathon?
Where does the Cardiff Half Marathon take place?
What is the elevation gain of the Cardiff Half Marathon?
How can I prepare for the Cardiff Half Marathon?
How do I choose the right training plan for the Cardiff Half Marathon?
The Cardiff Half Marathon offers a fast, flat course through the vibrant streets of Wales’ capital, passing iconic sites like Cardiff Castle and Cardiff Bay. Organized by Run 4 Wales, this event, held on October 5, 2025, draws thousands of runners from across the globe for an unforgettable experience.
The Cardiff Half Marathon is 21km long.
The Cardiff Half Marathon takes place in Cardiff, Wales, UK.
Runna classifies the Cardiff Half Marathon elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Cardiff Half Marathon?
The Cardiff Half Marathon offers a fast, flat course through the vibrant streets of Wales’ capital, passing iconic sites like Cardiff Castle and Cardiff Bay. Organized by Run 4 Wales, this event, held on October 5, 2025, draws thousands of runners from across the globe for an unforgettable experience.
How long is the Cardiff Half Marathon?
The Cardiff Half Marathon is 21km long.
Where does the Cardiff Half Marathon take place?
The Cardiff Half Marathon takes place in Cardiff, Wales, UK.
What is the elevation gain of the Cardiff Half Marathon?
Runna classifies the Cardiff Half Marathon elevation profile as Flat.
How can I prepare for the Cardiff Half Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Cardiff Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Cardiff Half Marathon or Run 4 Wales. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Cardiff Half Marathon website.
