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Trail runs in South Wales

Find trail runs in South Wales in 2025/2026 - 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 join this Smurf Run at the picturesque Dare Valley in Wales! Who doesn't love those little blue characters and therefore a medal reflecting how adorable they are!
  • Sat 22 Nov
  • £16-£35
Aberdare, Mid Glamorgan, UK

Smurf Run | Wales

Come and join this Smurf Run at the picturesque Dare Valley in Wales! Who doesn't love those little blue characters and therefore a medal reflecting how adorable they are!

  • Families
  • Newcomers
  • Event village
  • Park
  • All ages
  • Road run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
Get your Santa suits, reindeer antlers, and elf ears ready — Christmas is Coming, and so is the most magical fun run of the year!
  • Sat 20 Dec
  • £9
Aberdare, Mid Glamorgan, UK

Santa Run Wales

Get your Santa suits, reindeer antlers, and elf ears ready — Christmas is Coming, and so is the most magical fun run of the year!

  • Families
  • Newcomers
  • Fancy dress
  • Event village
  • Park
  • All ages
  • Fun run
  • 5K run
If you're looking to spice up your run or you need some running like you've never needed running before, then this is the event for you!
  • Sat 24 Jan 2026
  • £16-£35
Aberdare, Mid Glamorgan, UK

Spice Up Your Run - Wales

If you're looking to spice up your run or you need some running like you've never needed running before, then this is the event for you!

  • Families
  • Newcomers
  • Fancy dress
  • Event village
  • Park
  • All ages
  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
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 2026
  • £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!

  • Families
  • Newcomers
  • Event village
  • Park
  • All ages
  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
Didn't get a ballot entry into The London Marathon 2026? Don't panic, come and run with Saturn Running instead!
  • Sun 26 Apr 2026
  • FREE-£35
Aberdare, Mid Glamorgan, UK

The Nearly But Not Quite London Marathon - Wales

Didn't get a ballot entry into The London Marathon 2026? Don't panic, come and run with Saturn Running instead!

  • Families
  • Newcomers
  • Event village
  • All ages
  • Trail run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
  • Sat 8 Nov
Swansea, West Glamorgan, UK

EnduranceLife - Gower

  • 10K run
  • Half marathon
  • Marathon
  • Ultra run
  • Sat 15 Nov
Port Talbot, West Glamorgan, UK

Margam Park Trail Races

  • 5K run
  • 10K run
  • Half marathon
  • Sun 16 Nov
Cardiff, UK

Cardiff Trail Half Marathon

  • 13.1 miles trail running
  • Sat 29 Nov
Caerphilly, Gwent, UK

Machen Trail Races: Half Marathon and Marathon

  • Half marathon
  • Marathon
  • Sun 30 Nov
Port Talbot, West Glamorgan, UK

RTT Afan Forest 10k & 5K

  • 5K run
  • 10K run
  • Sat 13 Dec
Grecynon, Mid Glamorgan, UK

Celtic Trail Races

  • Marathon
  • Ultra run
  • Half marathon
  • Sun 15 Feb 2026
Caerphilly, Gwent, UK

Caerphilly Trail 5K and 10K

  • 5K run
  • 10K run
  • Sun 22 Mar 2026
Port Talbot, West Glamorgan, UK

Red Warrior Multi Terrain Races | 20K

  • 20 km multi terrain running
  • Sat 11 Apr 2026
Swansea, West Glamorgan, UK

RTT Gower Trail Half Marathon & 10K

  • 5K run
  • 10K run
  • Half marathon
  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon

  • Half marathon
  • Marathon

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