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Cardiff Half Marathon 2021

Sun 3rd October 2021

Cardiff Half Marathon 2021

One of Europe’s largest and most prestigious half marathons, Cardiff is fast, flat and lively! Join our Welsh #TeamCALM and go for your life. Pob Lwc!

The 18th edition of the Cardiff Half Marathon will take place Sunday 3 October 2021 (postponed from Sunday 4 October 2020). If you have a 2020 charity place with us, you will be automatically be deferred over to the October 2021 event.

Apply for a CALM place

Fundraising Target: £400 | Registration Fee: £25

Kick start your fundraising

If you already have your own Cardiff Half place and want to run for CALM, register your event.


Whilst you’re here… Join the CALM Running Collective

As we carry on planning the best on the day supporter experience in the biz, check out and join the CALM Running Collective. It’s a place for runners of every age, shape, and ability – we share training tips, encouragement, stories, failures and successes. It’s about a shared passion and mission, using exercise to look after yourself, and each other during these confusing times. 


Sun 3rd October 2021
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