Running
Half Marathon
21.1 km
Start: 10:00 PM
Cardiff Half Marathon
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Road runs in United Kingdom, Cardiff
Distances
Running
Junior Fun Run
2.4 km
Start: 11:45 PM
12.00 EUR
Running
Future Challengers
1 km
Start: 11:00 PM
12.00 EUR
Running
Toddler Dash
0.1 km
Start: 10:30 PM
Running
Toddler Dash
0.1 km
About
The Cardiff Half Marathon has grown into one of the largest and most exciting road races in the United Kingdom; and is truly a Race For Everyone. It is now one of Europe’s largest half marathons and is Wales’ largest mass participation and multi-charity fundraising event. The event has grown significantly since it was founded by Barnardo’s in 2003 when 1,500 runners took part. It now attracts a mass race field of over 27,500 registered runners alongside world-class athletes in a trio of fiercely contested men’s, women’s and wheelchair elite races.
Catering & aid stations
On-course water, sports drink and energy gel stations available throughout the route. Details in race info.
Results
View official resultsSurface mix
- 100% asphalt
Typical weather in Cardiff
Monthly averages based on historical data (2000–present).
Jan8°3°
↑ 08:13
↓ 16:32
Feb8°3°
↑ 07:29
↓ 17:27
Mar10°4°
↑ 06:27
↓ 18:18
Apr13°6°
↑ 06:17
↓ 20:10
May16°9°
↑ 05:21
↓ 20:59
Jun18°12°
↑ 04:56
↓ 21:32
Jul20°13°
↑ 05:14
↓ 21:24
Aug20°13°
↑ 06:00
↓ 20:37
Sep18°12°
↑ 06:49
↓ 19:29
Oct14°9°
↑ 07:38
↓ 18:21
Nov11°6°
↑ 07:32
↓ 16:25
Dec8°4°
↑ 08:13
↓ 16:05
Route maps
What's included in entry
- Participants must be 17 years of age or older on the day of the event
- When registering all participants must sign our terms and conditions.
- Participants must complete the 13.1 mile course within the cut off time of 4 hours.
- Names and/or video footage or photographs taken during their participation may be used to publicise the Cardiff Half Marathon or other Run 4 Wales events.
- Participant race numbers may not be passed on or sold to any other person. We offer a gifting service to runners until the publicised booking edits deadline.
- Registrations will close on the date publicised on the event website.
- Participants must not be under the influence of drugs or alcohol.
- Participants must be fit to run and free from injury.
- Under no exceptions can a participant collect their race pack after the designated time slots.
- Chip timing
- Race pack
- Finisher medal
Prices & signup
- Junior Fun Run12.00 EUR
- Future Challengers12.00 EUR
Last updated: Jun 5, 2026, 08:11:29 PM
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