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Marathons in Wales in July 2026

Find marathons in Wales in July 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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The most epic trail marathon in Wales! Iconic and spectacular trails, circumnavigating then climbing the slopes of Wales' highest peak - Yr Wyddfa (Snowdon).
  • Sun 12 Jul
  • £59.99-£64.99
Caernarfon, Gwynedd, UK

Snowdonia Trail Marathon Eryri

The most epic trail marathon in Wales! Iconic and spectacular trails, circumnavigating then climbing the slopes of Wales' highest peak - Yr Wyddfa (Snowdon).

  • 27.3 miles trail running + 1685 m ascent
  • Chip timing
  • Enter online
  • Mountainous
  • Age 18 & over
Who hasn't completed a race, sworn they will never run again and then booked onto another one the following day?!
  • Sat 25 Jul
  • £16-£35
Aberdare, Mid Glamorgan, UK

Ooops I Ran It Again | Wales

Who hasn't completed a race, sworn they will never run again and then booked onto another one the following day?!

  • Road run
  • 5K run
  • 10K run
  • Half marathon
  • Marathon
  • + 3 more races
  • Families
  • Beginner-friendly
  • Event village
  • Park
  • All ages
  • Sat 18 Jul
  • £89
Swansea, West Glamorgan, UK

Gower Peninsula Ultra Challenge | Marathon 42K Loop

  • 42 km multi terrain running + 900 m ascent

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