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Run

Cardiff Half Marathon

Event Type Half Marathon
Event Date 05 October 2025
Location Cardiff
Registration Fee £15
Fundraising Target £250
Level Moderate

 

Registrations for Cardiff Half Marathon 2025 are now open!


The Cardiff Half Marathon is Wales' largest mass participation event, with fantastic crowd support on race day. 

The route will take you past the capital’s most iconic landmarks, with beautiful scenery and historic buildings.

The mainly fast and flat route makes it ideal for both beginners and those aiming to achieve a personal best.

Running for Alzheimer’s Society

Charity entries

Join team Alzheimer’s Society at the Cardiff Half Marathon and feel amazing about giving help and hope to people living with dementia. To run the Cardiff Half Marathon, you’ll need to pay a registration fee of £15 and set a fundraising target of £250. We’ll be there to support you every step of the way. 

Sign up today!

When you run for us, you'll receive:

  • a support pack with fundraising help and materials
  • a free running top to wear on race day
  • detailed training guides for different abilities and personalised support from our experts
  • access to a Facebook group where you can chat to other runners
  • support from our dedicated events team to help you smash your fundraising target
  • the biggest cheers on race day and an invite to our post-race marquee for well-deserved refreshments.

 

Own place entries

Already have your own place in the Cardiff Half Marathon? Use it to run for Alzheimer’s Society and join thousands of others who are determined to stop dementia devastating lives. 

You’ll have no registration fee and we’ll be there to support you every step of the way. Simply set your own fundraising target and we'll work with you to help you smash it. 

Use your place to run for us

Fundraising for Alzheimer's Society

We know that fundraising can be just as challenging as the event, but our expert team will be on hand to help. Your support pack will get you started, and we’ll be in regular contact with support, advice and ideas.

JustGiving

Kick-start your fundraising by setting up a JustGiving page. You can easily share your page with your friends, family and colleagues on social media and email, plus everything happens automatically.

The money you donate is sent to us, Gift Aid collected, and your sponsors thanked. Job done!

Set up a JustGiving page

Fundraising for your run

From posters and sponsorship forms to social media badges and advice on promoting an event, find all the resources you need to smash your fundraising in our hub.

Go to the fundraising hub

Frequently asked questions

You can order your top when you complete our registration form or by emailing [email protected] with your size (XS to XXL) and style (vest/t-shirt).

If you have let us know your size, we will send your top to you in the post approximately a month before race day.

We’ll send out a link to our Training Zone in your welcome emails. Here you will find our training guide and plans for every ability plus loads of other advice covering areas including nutrition, injuries and tapering. 

We’ll also give you contact details for our expert running coaches, so you get in touch directly with any questions.

If you’re collecting money on a JustGiving page, there’s nothing you need to do, your sponsorship comes directly to us.

If you have collected any cash, you can bank it and pay in using one of these options: 

  • Pay the donations directly onto your JustGiving page if you have one.
  • Pay in online using our secure payment page.
  • Send a cheque made payable to Alzheimer’s Society to Alzheimer’s Society, Scott Lodge, Scott Road, Plymouth, PL2 3DU. Please include our paying in form so we have your event details.
  • Pay over the phone with a credit or debit card. Call our lovely customer care team on 0300 222 5808.

We ask that you please send in all donations within 6 weeks of the event.

Of course! Please let us know when you sign up by creating a team. Your team members can then join you by clicking on the ‘find’ button and typing in either the team captain’s name or your team name.

The fundraising target for charity places is still £250 per person but you're welcome to combine your targets into one team total.

This event is open to everyone aged 17 or over on race day.

Contact us about this event

Got a question about this event? Get in touch and we'll respond as soon as we can.

Ask a question
Call the events team