The Cardiff Half Marathon is a major running event in the Welsh capital, known for its flat, fast and scenic course and strong support from spectators. Organised by Run 4 Wales, it welcomes a broad range of participants, with entry options for general runners, charity entrants, international participants, elite athletes and people seeking disability access support. The event also offers a junior run and a business challenge, alongside volunteering opportunities and race-week activities such as HIGH5 Shake Out Runs.

Participants can find practical race-day information, route details, travel and parking guidance, accommodation advice, accessibility information and live tracking and streaming. The website also provides training resources, hydration and nutrition guidance, medical and safety advice, and links to running clubs. Runners can support charity partners, including NSPCC, through fundraising resources and entry options. Spectators can access course and entertainment information, while event coverage includes news, photos, videos and race results. The Cardiff Half Marathon is part of a wider calendar of events organised by Run 4 Wales, including races in Newport, Barry Island, Porthcawl and other locations.