4

Road Half marathons in South Wales in March 2026

Find road half marathons in South Wales in March 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

Filter by place

Filter by date

Filter by category

Map

Event listings

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

Come and join the Dashing Dog Charity run in the picturesque Dare Valley Country Park. Not only is the scenery beautiful but you will earn one of these awesome medals for your half marathon!
  • Sun 15 Mar
  • £24-£38
Aberdare, Mid Glamorgan, UK

The Dashing Dog Charity Run | Wales | Half Marathon

Come and join the Dashing Dog Charity run in the picturesque Dare Valley Country Park. Not only is the scenery beautiful but you will earn one of these awesome medals for your half marathon!

  • 13.1 miles road running
  • Enter online
  • Flat
  • Traffic free
  • Age 17 & over
  • Sun 1 Mar
  • £38-£40
Newport, Gwent, UK

The KLA City of Newport Half Marathon

  • 13.1 miles road running
  • Sun 1 Mar
  • £30-£35
Cardiff, UK

St Davids Day Run | Half Marathon

  • 13.1 miles road running
  • Sun 22 Mar
  • £37-£42
Merthyr Tydfil, Mid Glamorgan, UK

The Merthyr Half Marathon | Half Marathon

  • 13.1 miles road running

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.