30 Half marathons in Wales

Find half marathons in and around Wales for 2024/2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Click an event for full event details, location, route, sustainability, what's included and how to enter.

It's time to conquer the Cardiff Summer Half Marathon, have a morning out with family, friends, or colleagues and enjoy the stunning Bute Park then receive your superb medal!
  • Sat 29 Jun
  • £25-£30
Cardiff, Cardiff, UK

Conquer Cardiff Summer | Half Marathon

It's time to conquer the Cardiff Summer Half Marathon, have a morning out with family, friends, or colleagues and enjoy the stunning Bute Park then receive your superb medal!

  • 13.1 miles road running
Wales' spectacular mountain half marathon! A tough route with over 1,192m of ascent, most of which is up Wales’ highest peak, with incredible views all the way to Anglesey and a downhill finish too.
  • Sun 14 Jul
  • £45.99-£47.99
Caernarfon, Gwynedd, UK

XTERRA Snowdonia Trail Half Marathon Eryri

Wales' spectacular mountain half marathon! A tough route with over 1,192m of ascent, most of which is up Wales’ highest peak, with incredible views all the way to Anglesey and a downhill finish too.

  • 12.9 miles trail running
An exciting and spectacular event starting near Table Mountain and exploring the nearby Black Mountains, with incredible support guaranteed.
  • Sat 28 Sep
  • £49.99
Crickhowell, Powys, UK

Beacons to the Blacks | Half Marathon

An exciting and spectacular event starting near Table Mountain and exploring the nearby Black Mountains, with incredible support guaranteed.

  • 13.1 miles trail running
An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage! Charity runners, entertainment, huge crowd support and Event Village.
  • Sun 6 Oct
  • FREE-£78
  • 31 charities
Cardiff, South Glamorgan, UK

Cardiff Half Marathon

An iconic road race around Wales' capital offering a flat course from the castle to the marina and over the Cardiff Bay barrage! Charity runners, entertainment, huge crowd support and Event Village.

  • 13.1 miles road running
A top class half marathon event on a challenging and scenic trail around Llyn Elsi that is friendly, inclusive, sustainable, runner-focused, fun and rewarding. Come and see what the fuss is about!
  • Sat 30 Nov
  • £33
Betws-y-Coed, Clwyd, UK

Betws-y-coed Trail Challenge | Half Marathon

A top class half marathon event on a challenging and scenic trail around Llyn Elsi that is friendly, inclusive, sustainable, runner-focused, fun and rewarding. Come and see what the fuss is about!

  • 13.1 miles trail running
  • Sun 31 Mar
  • £18-£20
Cardiff, Cardiff, UK

Cardiff Taff Trail Half Marathon

This is a Road Race and not a Trail Race

  • 13.1 miles road running
  • Sun 14 Apr
  • FREE-£27.50
Prestatyn, Clwyd, UK

Summit 2 Sea - The Offa's Dyke Half Marathon

The Spring race involving summit and sea, we will be going 'Summit 2 Sea' - and the Half Marathon (ish - it's 13.8 miles) will see runners gather on the summit of Moel y Parc...

  • 13.8 miles trail running
  • Sun 14 Apr
  • £35
Carmarthen, Dyfed, UK

The Pendine Races | Half Marathon

The Pendine Sands 5K & 10K are on the beach. The Half & Full Marathon take in the full length of the beach and then return along quiet lanes.

  • 13.1 miles trail running
  • Sun 14 Apr
  • £37-£39
Colwyn Bay, Clwyd, UK

Pier2Pier Half Marathon

A scenic Half Marathon that starts and finishes at the Athletics track Colwyn bay, after completing 300m on the track, the route takes you to the Colwyn bay pier,

  • 13.1 miles road running
  • Sat 27 Apr
  • £47
Haverfordwest, Pembrokeshire, UK

EnduranceLife - Pembrokeshire | Half Marathon

As Britain's only coastal National Park primarily designated for its coastal landscape, Pembrokeshire is justifiably famous for its rugged cliffs, quiet coves, expansive sandy bays,

  • 13.4 miles trail running
  • Sat 4 May
  • £52
Brecon, Powys, UK

TEC Brecon Beacons | Half Marathon

The Brecon Beacons Trail Running Challenge is now entering its 10th year in Talyboont-on Usk and is one of the most popular events on the trail running calendar in Wales.

  • 27.2 km trail running
  • Sat 11 May
  • £35
Cardiff, Cardiff, UK

Radyr and Morganstown Trail | Half Marathon

Radyr Trail Half Marathon & Trail Marathon start in Wales' capital city, Cardiff but you'll soon feel a million miles away as you leave the hustle and bustle behind you for idillic trails and scenery.

  • 13.1 miles trail running
  • Sun 12 May
  • £37-£39
Llanrwst, Clwyd, UK

Snowdonia Half Marathon

One of The UK’s Toughest Half Marathon Warning! Warning! Warning! This is very tough! This is very tough!

  • 13.1 miles road running
  • Sun 12 May
  • £40
Mold, Clwyd, UK

Excalibur Marathon | Half Marathon

Altitude with Attitude Marathon/Half/10K over 5,500ft of Ascent

  • 13.1 miles trail running
  • Sat 18 May
  • £35
Aberdare, Mid Glamorgan, UK

Dare Valley Trail Races | Half Marathon

Embark on a magical trail running journey through ancient woodlands, hidden reservoirs, towering wind turbines and unrivalled views of the Brecon Beacons National park culminating in a dramatic,

  • 13.1 miles trail running
  • Sat 18 May
  • £45
Crickhowell, Powys, UK

Blacks to the Beacons | Half Marathon

Whether you’re a season Marathon and Ultra runner or this is your first attempt at a longer distance, we guarantee you will have an amazing day. The Blacks to the Beacons is part of our Trail Festival

  • 13.1 miles trail running
  • Sat 1 Jun
  • £40
Brecon, Powys, UK

Midnight Mountain | Half Marathon

The Midnight Mountain Marathon is no ordinary marathon.

  • 13 miles fell running
  • Sun 2 Jun
  • £35
Tywyn, Gwynedd, UK

Cadair X

Possibly the toughest half marathon in the UK, and the most awe-inspiring.

  • 13.1 miles trail running
  • Sat 8 Jun
  • £45
Crickhowell, Powys, UK

Black Mountains | Half Marathon

Limitless Trails are very excited to be offering another Ultramarathon and Marathon in the beautiful Black Mountains, deep in the heart of the Brecon Beacons National Park.

  • 13.1 miles trail running + 2738 ft ascent
  • Sun 9 Jun
  • £38-£40
Swansea, West Glamorgan, UK

Swansea Half Marathon

10th Swansea Half Marathon

  • 13.1 miles road running
  • Sat 15 Jun
  • £35
Dolgellau, Gwynedd, UK

Salomon | Trail Half Hanner

Taking place in 2024, the Salomon Trail Marathon Wales and Trail Half Hanner will have full (26 mile / 42km) and half (13mile / 21 km) marathon race routes...

  • 13 miles trail running
  • Sat 22 Jun
  • £45
Brecon, Powys, UK

TEC Black Mountains | Half Marathon

Set at Newcourt Farm in Felindre, Wales, we are in the perfect place for trail running and these challenges are along some of the best trails this region has to offer.

  • 23 km trail running
  • Sun 23 Jun
  • £40
Pembroke, Pembrokeshire, UK

The Wales Half Marathon

Set in the beautiful Pembrokeshire Coast National Park...

  • 13.1 miles road running
  • Sat 29 Jun
  • £54
Conwy, Clwyd, UK

Snowdonia Race | Half Marathon

Explore majestic Snowdonia National Park! Trail Half Marathon, 10K & Kids 1 mile. +Yoga, festivities & camping!

  • 13.1 miles trail running
  • Sat 6 Jul
  • £35
Port Talbot, West Glamorgan, UK

Afan Forest Trail Races | Half Marathon

A roller coaster awaits at this spectacular trail run around the Afan and Glyncorrwg forests.

  • 13.1 miles trail running
  • Sat 6 Jul
  • £48
Caernarfon, Gwynedd, UK

TEC Eryri The Crossing | Half Marathon

Eryri (Snowdonia) The Crossing 2024

  • 21.45 km trail running
  • Sat 7 Sep
  • £26
Caernarfon, Gwynedd, UK

Marathon Creulon | Half Marathon

This amazing route takes you on an undulating trail run around the lake and then up and down Wales's highest mountain, Yr Wyddfa (Snowdon).

  • 13.1 miles trail running
  • Sat 14 Sep
  • £32-£34
Pwllheli, Gwynedd, UK

Hopalong Clothing Abersoch Half Marathon and Fun Run | Half Marathon

The Hopalong Abersoch Half Marathon has a world-class course and superb atmosphere, great crowds and a stunning route set in the picturebook seaside village of Abersoch.

  • 13.1 miles road running
  • Sun 29 Sep
  • £34
Haverfordwest, Pembrokeshire, UK

Pembrokeshire | Half Marathon

A 10k and a Half Marathon, both of which start and finish in the beautiful village of Dale.

  • 13.1 miles road running
  • Sat 9 Nov
  • £35
Port Talbot, West Glamorgan, UK

Margam Trail Races | Half Marathon

Join the Trail Revolution and experience the undulating trails of Margam Park and autumn in the forest.

  • 13.1 miles trail running

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