Radyr Trail Races

The Radyr Trail Races offer a scenic yet demanding endurance experience starting in Cardiff, Wales. Scheduled for Saturday, May 9, 2026, as part of the Radyr and Morganstown Festival, the event features both a half marathon and a full marathon. The races transition from the urban fringes of the capital into the rugged countryside, with proceeds benefiting local charitable organizations.

Race Categories and Schedule

The event is structured to accommodate both intermediate trail runners and experienced mountain athletes. While the half marathon is designed to be accessible, the marathon is noted for its significant elevation gain and navigational requirements.

Distance	Start Time	Total Climb	Cost
Marathon	8:00 AM	~1,300 Meters	£50
Half Marathon	9:00 AM	Varies	£40

Geography and Course Conditions

The geography of the Radyr area is defined by the Taff Valley and the surrounding peaks of South Wales. The central landmark of the course is the Garth Mountain, which provides expansive views of the Bristol Channel and the Brecon Beacons. Runners will encounter a mix of dense woodlands, forest tracks, and exposed mountain trails, concluding with a flat section through a local nature reserve. In early May, Cardiff typically experiences temperate spring weather, with average highs of 16°C (61°F) and a high probability of damp trails. While the half marathon is fully marked, the marathon requires self-navigation skills for several circular loops that extend beyond the primary route.

Logistics and Safety

Logistically, the race is based at the Cardiff Harlequins RFC on Forest Farm Road. Registration for the marathon opens at 6:00 AM, while half marathon registration begins at 7:45 AM. A mandatory kit check is conducted at registration; participants without the required safety gear will not be permitted to start. The event follows a "by runners for runners" ethos, providing marshals at critical junctions and medical support throughout the course. The venue is conveniently located within a five-minute walk of Radyr Train Station, and changing rooms and showers are available on-site for all finishers.

Cut-off Times and Pace Requirements

To ensure the safety of all participants and volunteers, strict time limits are enforced at various checkpoints:

Half Marathon: Must be completed by 2:30 PM (approx. 2.5 mph pace). Full Marathon: Must be completed within 8 hours by 4:00 PM (approx. 3.25 mph pace). Aid Stations: The half marathon features two checkpoints, while the marathon includes three, each providing water and light refreshments.