6

Trail 5K runs in South Wales

Find trail 5k 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.

Filter by date

Filter by place

Filter by category

Map

Event listings

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

Get your Santa suits, reindeer antlers, and elf ears ready — Christmas is coming, and so is the most magical 5K fun run of the year!
  • Sat 20 Dec
  • £9
Aberdare, Mid Glamorgan, UK

Santa Run Wales | 5K

Get your Santa suits, reindeer antlers, and elf ears ready — Christmas is coming, and so is the most magical 5K fun run of the year!

  • Enter online
  • Traffic free
  • All ages
  • 5 km trail running
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! Come and celebrate all things Spice Girls!
  • Sat 24 Jan 2026
  • £22-£27
Aberdare, Mid Glamorgan, UK

Spice Up Your Run | Wales | 5K

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! Come and celebrate all things Spice Girls!

  • Enter online
  • Age 12 & over
  • 5 km trail running + 249 ft ascent
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
  • £22-£27
Aberdare, Mid Glamorgan, UK

St Davids Day Dragon Run | 5K

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

  • Enter online
  • Age 12 & over
  • 5 km trail running
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
  • £22-£27
Aberdare, Mid Glamorgan, UK

The Nearly But Not Quite London Marathon - Wales | 5K

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

  • Enter online
  • Age 12 & over
  • 5 km trail running + 0 ft ascent
  • Sun 15 Feb 2026
Caerphilly, Gwent, UK

Caerphilly Trail 5K and 10K | 5K

  • 5 km trail running
  • Sat 11 Apr 2026
Swansea, West Glamorgan, UK

RTT Gower Trail Half Marathon & 10K | 5K

  • 5 km trail running

Other UK events

Search options

Back to search options
4 steps to wellbeing
Sleep well

A good night's sleep is an essential foundation for a healthy lifestyle, effective training and weight control.

Train slow

Low-intensity training is easier for you, reduces the risk of injury and helps builds an efficient aerobic system.

Eat natural

Cut out sugar & junk food, reduce carbs, eat natural foods and train your body to burn fat for fuel.

Get outdoors

Fresh air, natural light and reconnecting with nature all help to improve mental and physical wellbeing.