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Trail runs in South Wales

Find trail runs in South Wales in 2026/2027 - filter by date, location or category, 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.

Come and get involved in the second St David's Day Dragon Run in the beautiful Dare Valley Country Park in, of course, Wales!
  • Sun 1 Mar
  • £16-£35
Aberdare, Mid Glamorgan, UK

St Davids Day Dragon Run

Come and get involved in the second St David's Day Dragon Run in the beautiful Dare Valley Country Park in, of course, Wales!

  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
  • Families
  • Beginner-friendly
  • Event village
  • Park
  • All ages
Didn't get a ballot entry into The London Marathon? Don't panic, come and experience this event instead and earn a fantastic London-themed medal!
  • Sun 26 Apr
  • FREE-£35
Aberdare, Mid Glamorgan, UK

The Nearly But Not Quite London Marathon | Wales

Didn't get a ballot entry into The London Marathon? Don't panic, come and experience this event instead and earn a fantastic London-themed medal!

  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
  • Families
  • Beginner-friendly
  • Event village
  • Park
  • All ages
Set on the stunning Gower Peninsula, the UK’s first Area of Outstanding Natural Beauty and famous for its golden beaches, limestone cliffs, wild moors, ridges and woodlands.
  • Sat 18 - Sun 19 Jul
  • £49-£199
Swansea, West Glamorgan, UK

Gower Peninsula Ultra Challenge

Set on the stunning Gower Peninsula, the UK’s first Area of Outstanding Natural Beauty and famous for its golden beaches, limestone cliffs, wild moors, ridges and woodlands.

  • 100K ultra run 2
  • Ultra run
  • 50K ultra run 2
  • Marathon
  • Multi-terrain run
  • + 1 more race
  • Beginner-friendly
  • Entertainment
  • Event village
  • Rural
  • Age 8 & over
  • Sun 1 Mar
  • £80
Cardiff, Mid Glamorgan, UK

Brecon to Cardiff Ultra

  • 70 km trail running
  • Sun 1 Mar
  • £45
Merthyr Tydfil, Mid Glamorgan, UK

Brecon to Cardiff Xtreme & Taff Xtreme Marathon | Taff Xtreme Marathon

  • 26.2 miles trail running
  • Sun 22 Mar
  • £30-£35
Port Talbot, West Glamorgan, UK

Red Warrior Multi Terrain Races | 20K

  • 20 km multi terrain running
  • Sat 11 Apr
  • £33-£46
Bridgend, South Glamorgan, UK

Vale Coastal Trail Races

  • 10 miler
  • Trail run
  • Ultra run
  • Sat 11 Apr
  • £19.95-£39.95
Swansea, West Glamorgan, UK

RTT Gower Trail Half Marathon & 10K

  • 5K run
  • 10K run
  • Half marathon
  • Wed 15 - Mon 20 Apr
  • £549
Chepstow, Gwent, UK

South Wales 200

  • 5 days trail running
  • Sat 25 Apr
  • £95
Penarth, South Glamorgan, UK

The Medieval Backyard Ultra

  • 1 hr trail running
  • Sat 9 May
  • £40-£50
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon

  • Half marathon
  • Marathon
  • Sat 18 Jul
  • £2-£60
Bridgend, Mid Glamorgan, UK

Rabbit Run Wales

  • Fun run 3
  • Trail run
  • Marathon
  • Ultra run
  • Sun 20 Dec
  • £24-£40
Aberdare, Mid Glamorgan, UK

The Snow Globe Gallop Bobble Hat Run - Wales

  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races

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