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Trail runs in South Wales

Find trail runs near me in South Wales for 2025/2026 - filter by date or location, display on a map or use the advanced search to find your perfect race.

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Select an event for photos, video, route, location, reviews, entry fees and how to enter.

  • Sat 29 Nov
Caerphilly, Gwent, UK

Machen Trail Races: Half Marathon and Marathon | Marathon

  • 26 miles trail running + 4760 ft ascent
  • Sat 29 Nov
Caerphilly, Gwent, UK

Machen Trail Races: Half Marathon and Marathon | Half Marathon

  • 14 miles trail running + 2719 ft ascent
  • Sat 13 Dec
Grecynon, Mid Glamorgan, UK

Celtic Trail Races | Ultra

  • 34 miles trail running + 5194 ft ascent
  • Sat 13 Dec
Grecynon, Mid Glamorgan, UK

Celtic Trail Races | Marathon

  • 26 miles trail running + 3050 ft ascent
  • Sat 13 Dec
Neath, West Glamorgan, UK

Celtic Trail Races | Half Marathon

  • 13 miles trail running + 2200 ft ascent
  • Sat 20 Dec
Aberdare, Mid Glamorgan, UK

Santa Run Wales | 2.5K

  • 2.5 km trail running
  • Sat 20 Dec
Aberdare, Mid Glamorgan, UK

Santa Run Wales | 5K

  • 5 km trail running
  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon | Marathon

  • 26.2 miles trail running
  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon | Half Marathon

  • 13.1 miles trail running

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