Running Events in Cardiff, Wales 2025-2026

Running events in Cardiff offer a range of distances, including 5k, 10k, and half marathons, providing opportunities for both experienced and novice runners. Participants can enjoy scenic routes throughout the city and surrounding landscapes, including family-friendly races and major events such as the Cardiff Half Marathon.

Cardiff hosts a diverse selection of running events each year, catering to athletes of all levels. Popular shorter distances, like 5k and 10k races, create a friendly and inclusive atmosphere, ideal for those looking to get active and engage with the local community. Notably, the city organizes the Winter Warmer series for runners aiming for New Year's fitness resolutions. Major events such as the Cardiff Half Marathon attract thousands of participants, taking runners past iconic landmarks including Cardiff Castle and Penarth Marina. The nearby Brecon Beacons National Park presents challenging trail runs with stunning views and options for ultra marathons, inspired by SAS training routes. Upcoming events include: - 2026 CDF 10K: Sun, Sep 6, 2026, Cardiff, GB. (Run 2km - Run 10km) - 2026 ABP Newport Marathon Festival: Sun, Apr 19, 2026, Newport, GB. (Run 0.05km - Run 26.2mi) - 2026 Barry Island 10K: Sun, May 17, 2026, Barry, GB. (Run 0.05km - Run 10km) - 2025 Oysho Cardiff Half Junior: Sat, Oct 4, 2025, Cardiff, GB. (Run 0.05km - Run 10 minutes) - 2025 Albert Goodman Weston Super Half: Sun, Oct 19, 2025, Weston-super-Mare, GB. (Run 1mi - Run 13.1mi) - Cardiff 1.5k, 5k, 10k & Half Marathon MoRun: Sat, Nov 8, 2025, Cardiff, GB. (Run 1.5km - Run 13.1mi) Further details and entry options can be found at the event listing website.