Sat 9 May 2026 Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon

Radyr Trail Half Marathon & Trail Marathon start in Wales' capital city, Cardiff but you'll soon feel a million miles away as you leave the hustle and bustle behind you for idyllic trails and scenery.

2 races

  • Sat 9 May 2026
  • #1 of 2
Cardiff Harlequins RFC, Cardiff

Half Marathon

09:00

Age 17 & over

£40

  • 13.1 miles trail running
  • Sat 9 May 2026
  • #2 of 2
Cardiff Harlequins RFC, Cardiff

Marathon

08:00

Age 18 & over

£50

  • 26.2 miles trail running

Event overview

The half marathon is an excellent trail run for new runners and veterans alike. You'll enjoy mountain views, woodlands, forest, and great camaraderie as you explore a range of trails and countryside paths. The highest point is the Garth mountain, the real star of the film An Englishman who Went up a Hill but Came down a Mountain (sorry, Hugh!). The last couple of miles finish in a flat nature reserve where you'll be rewarded with plenty of birdlife and squirrels darting around you. This event is part of the Radyr and Morganstown Festival, with proceeds going to local charities. The route will be fully marked, with two checkpoints to help you on your way. The route is not easy; the winners came in at 1hour 45 minutes in our first race, however, don't be put off by the challenge. Our sweepers walked the entire route well within the cut of times, we will do everything we can to get you around. The marathon has approximately 1,300 meters of climb, taking in the half marathon route above and adding an additional 13.1 miles of trails. This course is described by past runners as beautiful and brutal. A gpx and map will be provided. The winner's time is normally around 3hrs 30 so please expect to be out for longer than you would for a road marathon. Note: The half course will be fully marked ; The marathon route will require self navigation, though there will be marshalls at critical junctions to support you.

Event details

  • All fitness levels
  • Event village
  • Newcomers

Location

  • Changing facilities
  • Showers

Races at event

  • Sat 9 May 2026
  • #1 of 2
Cardiff Harlequins RFC, Cardiff
Half Marathon

09:00

Age 17 & over

£40

  • 13.1 miles trail running
  • Sat 9 May 2026
  • #2 of 2
Cardiff Harlequins RFC, Cardiff
Marathon

08:00

Age 18 & over

£50

  • 26.2 miles trail running