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Half Marathons Found In & Near Cardiff

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Half Marathons In & Near Cardiff 2025 - 2026

Find your next challenge with the most comprehensive list of Half Marathons in and near Cardiff in 2025 - 2026. Enjoy a diverse mix of city runs and scenic country races in and around the Welsh capital. For even more options, discover more Half Marathon events in Swansea, Bristol, and Cheltenham.

Boost your training efforts for half marathons with Cardiff 10k races or take a look at an even bigger challenge with our calendar of Cardiff Marathons.

Top Tip: Viewing this page in the default “Featured View” will show you all the Best Half Marathons in and around Cardiff. If you’re ready to set yourself a challenge right now then switching to “Bookable view” will show you those that can be booked instantly and securely through Find A Race. Guarantee your place today and get training :-)


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Race Calendar: Half Marathons In & Near Cardiff

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The Cardiff 1.5k, 5k, 10k & Half Marathon MoRun

Cardiff
08 Nov 25
£12.00 - £30.00
5.0

My Little Care Bear Run - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
19 Jul 25
£18.00 - £35.00

Wye Valley Tunnel Run (Marathon, Half, 10km, Colourburst)

Sedbury, Gloucestershire
20 Jul 25
£10.80 - £59.40
3.8

PHOENIX - South Wales - Flamingo Run

Treharris, Mid Glamorgan
20 Jul 25
£22.00 - £39.95

Chepstow Running Festival 5k, 10k & Half Marathon

Chepstow, Gwent
16 Aug 25
£28.00 - £142.00
4.3

Will Run For Ice Cream - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
30 Aug 25
£18.00 - £35.00

Fraggle Run - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
20 Sep 25
£18.00 - £35.00

Quantock Hills Trail Half Marathon

Kilve Court - SSE Outdoors Kilve, Bridgewater Somerset, TA5 1EA
05 Oct 25
£40.00

Scare Bear Run - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
18 Oct 25
£18.00 - £35.00

The Giddy Horse: Backyard 24hr, 12hr, 8hr Races (Solo & Team) Plus Canicross, Night Races, Obstacle Course Race & Trail Races

Chepstow, Gwent
25 Oct 25 - 26 Oct 25
£25.92 - £216.00

The Cardiff 1.5k, 5k, 10k & Half Marathon MoRun

Cardiff
08 Nov 25
£12.00 - £30.00
5.0

Smurf Run - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
22 Nov 25
£18.00 - £35.00

Machen Trail Races: Half and Full Marathons

Caerphilly, Mid Glamorgan
29 Nov 25
£40.00 - £50.00
4.8

A Christmas Carol Bobble Hat Run - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
21 Dec 25
£18.00 - £40.00

Spice Up Your Run - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
24 Jan 26
£18.00 - £35.00

Chepstow Running Festival

Chepstow, Monmouthshire
25 Jan 26
£28.00 - £142.00
4.3

St David's Day Dragon Run 2026

Dare Valley Country Park, Dare, Aberdare, Wales, CF44 7PS
01 Mar 26
£18.00 - £35.00

The Nearly But Not Quite London Marathon - Wales

Dare Valley Country Park, Aberdare, CF44 7PS
26 Apr 26
£18.00 - £35.00

Radyr & Morganstown Half Marathon and Marathon

Cardiff
09 May 26
£40.00 - £50.00
4.8

Chepstow Running Festival

Chepstow, Gwent
15 Aug 26
£28.00 - £142.00
4.3
Showing 1-19 of 19 results

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