Radyr Trail Marathon

MAY
8
2027
A trail marathon around Cardiff with about 1,300 m of climbing, mixed off-road terrain, partial self-navigation, checkpoints and support during the Radyr and Morganstown Festival.
Sat 8 May 2027
26 miles 13 miles

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Radyr Trail Marathon

The Radyr Trail Marathon takes place during the Radyr and Morganstown Festival and is held in the Cardiff area, starting from Cardiff Harlequins RFC, Diamond Ground, Forest Farm Road, Whitchurch, Cardiff CF14 7JN. Proceeds from the event go to local charities.

Distances:

  • Half Marathon (≈13.6 miles)
  • Marathon (≈26.3 miles, ≈1,300 m climb)

The route covers a variety of off-road terrain including mountain views, woodlands, forest and a flat nature reserve near the finish with notable birdlife and squirrels. The highest point on the course is the Garth mountain, which has been featured in film.

Course marking and navigation differ between races. The half marathon is fully marked and has signs at junctions; it is supported by a professional medical team. The marathon follows the half route for the opening miles but then includes three additional circular sections that require self-navigation; marshals will be stationed at critical junctions. Maps and a GPX file will be provided for the marathon.

Aid and logistics: the half has two checkpoints with water and light refreshments; the marathon has three similar checkpoints. There will be a kit check at registration and a full kit list is provided. The venue offers changing rooms, showers and ample parking, and is about a five minute walk from Radyr train station. Visit the organization's website for the most recent information.

Events nearby

A 30 mile trail ultra through the Brecon Beacons from Merthyr Tydfil, with technical terrain, four checkpoints and a six hour cut-off at checkpoint three.
Multi terrain races at Margam Country Park on 8 Nov 2026 featuring individual and CaniX 5K, 10K and 20K events plus a 12 x 5K Countdown Ultra.
Cross country meeting at Llandaff Fields in Cardiff on 8 November 2026, with age-group, school and senior races and World Athletics Silver Label status.
Timed lap event in Cardiff Bay offering flexible start times and distances from one 5.3 km lap up to multi lap ultra within a 7 hour limit.
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