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Trail Half marathons in May 2026

Find trail half marathons near me in May 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 aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.
  • Fri 1 May 2026
  • £20-£27
Egham, Surrey, UK

Midweek Chasing Numbers May | Half Marathon

The aim of the midweek runs is to hold events as cheaply as possible in order for people to be able to build their numbers or simply to help people achieve their own goals at an affordable price.

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
Come and join the day of running and aim to complete a midweek half marathon within the 7-hour time limit on a scenic course then receive a fantastic medal and goody bag at the finish!
  • Mon 4 May 2026
  • £20-£27
Staines, Surrey, UK

Bank Holiday Madness May | Half Marathon

Come and join the day of running and aim to complete a midweek half marathon within the 7-hour time limit on a scenic course then receive a fantastic medal and goody bag at the finish!

  • Enter online
  • Flat
  • Age 17 & over
  • 13.1 miles trail running + 0 ft ascent
The multi-terrain half marathon is mostly on road and covers a section of the longer distance routes.
  • Sun 10 May 2026
  • £35
Naseby, Northamptonshire, UK

Shires and Spires | Half Marathon

The multi-terrain half marathon is mostly on road and covers a section of the longer distance routes.

  • Chip timing
  • Enter online
  • Undulating
  • Age 18 & over
  • 13.4 miles multi terrain running + 897 ft ascent
This 25km is graded ‘hard’ and is on technical, fast flowing and rugged trails around Derwentwater, the Borrowdale Valley and the Watendlath Valley. Includes Full Weekend Festival Ticket in the price!
  • Sat 16 May 2026
  • £65
Keswick, Cumbria, UK

Keswick Mountain Festival | adidas TERREX Half Marathon Trail Run

This 25km is graded ‘hard’ and is on technical, fast flowing and rugged trails around Derwentwater, the Borrowdale Valley and the Watendlath Valley. Includes Full Weekend Festival Ticket in the price!

  • Newcomers
  • Music
  • Chip timing
  • Hilly
  • Event village
  • Age 18 & over
  • 25 km trail running + 866 m ascent
By popular demand, a half marathon trail race has been added to the multi-sports weekend at the scenic Roadford Lake, with an inclusive and encouraging atmosphere, and lakeside camping.
  • Sat 16 May 2026
  • £28
Lifton, Devon, UK

Roadford Lake Trail Races | Half Marathon

By popular demand, a half marathon trail race has been added to the multi-sports weekend at the scenic Roadford Lake, with an inclusive and encouraging atmosphere, and lakeside camping.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 13.1 miles trail running + 1298 ft ascent
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
  • Thu 21 May 2026
  • £17-£30
Durham, County Durham, UK

Dun Holm Challenge | Day 1 | Half Marathon

Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.

  • Enter online
  • Age 17 & over
  • 13.1 miles trail running + 72 ft ascent
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
  • Fri 22 May 2026
  • £17-£30
Durham, County Durham, UK

Dun Holm Challenge - Day 2 | Half Marathon

Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.

  • Enter online
  • Undulating
  • Age 17 & over
  • 13.1 miles trail running + 72 ft ascent
Can you survive Farmmageddon? A fantastic half marathon through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.
  • Sat 23 May 2026
  • £33-£38
Buntingford, Hertfordshire, UK

Farmmageddon | Half Marathon

Can you survive Farmmageddon? A fantastic half marathon through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.

  • Chip timing
  • Enter online
  • Traffic free
  • Age 18 & over
  • 13.1 miles trail running + 164 ft ascent
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
  • Sat 23 May 2026
  • £17-£30
Durham, County Durham, UK

Dun Holm Challenge | Day 3 | Half Marathon

Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.

  • Enter online
  • Undulating
  • Age 17 & over
  • 13.1 miles trail running + 72 ft ascent
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
  • Sun 24 May 2026
  • £17-£30
Durham, County Durham, UK

Dun Holm Challenge | Day 4 | Half Marathon

Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.

  • Enter online
  • Undulating
  • Age 17 & over
  • 13.1 miles trail running + 72 ft ascent
Based out of East Hull this race will run out on the TransPennine Trail towards Hornsea, it should allow runners to enjoy a flat even surface ideal or both beginners or for seasoned athletes...
  • Sun 24 May 2026
  • £30-£32
Hull, East Yorkshire, UK

Get the Hull out of Here | Half Marathon

Based out of East Hull this race will run out on the TransPennine Trail towards Hornsea, it should allow runners to enjoy a flat even surface ideal or both beginners or for seasoned athletes...

  • Enter online
  • Flat
  • PB
  • Age 17 & over
  • 13.1 miles trail running + 33 ft ascent
Race through the beautiful castle grounds over a half marathon route for all levels from first-timers to elite then celebrate with friends and family in the festival village.
  • Sun 24 May 2026
  • £36-£45
Gort, Ireland

Lough Cutra Castle | Half Marathon

Race through the beautiful castle grounds over a half marathon route for all levels from first-timers to elite then celebrate with friends and family in the festival village.

  • Chip timing
  • Enter online
  • Age 17 & over
  • 21.1 km trail running
Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.
  • Mon 25 May 2026
  • £17-£30
Durham, County Durham, UK

Dun Holm Challenge | Day 5 | Half Marathon

Whether you are a Durham resident, you just love the area, or you fancy running along the River Wear with views of the Cathedral, then this looped half marathon is for you! Durham-themed medals too.

  • Enter online
  • Undulating
  • Age 17 & over
  • 13.1 miles trail running + 72 ft ascent
New! A weekend of inclusive trail races, camping, festival vibes, yoga workshops, guided runs, live music and outdoor cinema, all based in the grounds of the iconic Blair Castle in the Cairngorms.
  • Sun 31 May 2026
  • £55
Pitlochry, Perth and Kinross, UK

Blair Castle Trail Weekender | Atholl Trail Half Marathon 21.1K

New! A weekend of inclusive trail races, camping, festival vibes, yoga workshops, guided runs, live music and outdoor cinema, all based in the grounds of the iconic Blair Castle in the Cairngorms.

  • Chip timing
  • Enter online
  • Mountainous
  • Traffic free
  • Age 18 & over
  • 21.1 km trail running + 400 m ascent
  • Sat 2 - Mon 4 May 2026
Keswick, Cumbria, UK

SCARPA Great Lakeland 3Day

  • 3 days fell running
  • Sun 3 May 2026
Shipston-on-Stour, Warwickshire, UK

Tempo Trail Races | Half Marathon

  • 13.1 miles trail running + 884 ft ascent
  • Sat 9 May 2026
Sidmouth, Devon, UK

Sid Valley Ring Half and Third Marathon | Half Marathon

  • 21.1 km trail running + 596 m ascent
  • Sat 9 May 2026
Cardiff, UK

Radyr Trail Races: Half Marathon and Marathon | Half Marathon

  • 13.1 miles trail running
  • Sun 10 May 2026
Corby, Northamptonshire, UK

Run Rabbit Trail Festival | Thump Trail Half

  • 13.1 miles trail running
  • Sun 10 May 2026
Macclesfield, Cheshire, UK

Happy Valley Trails Event | Half Marathon

  • 13.1 miles trail running + 770 m ascent
  • Sun 10 May 2026
Thirsk, North Yorkshire, UK

Hardmoors 26.2 White Horse Trail Marathon | Half Marathon

  • 16.5 miles trail running + 1900 ft ascent
  • Sun 10 May 2026
Reading, Berkshire, UK

Goring Gap Trails | Run - Half Marathon

  • 13.1 miles trail running + 102 m ascent
  • Sat 16 May 2026
Matlock, Derbyshire, UK

White Peak Half Marathon

  • 13.1 miles trail running + 800 ft ascent
  • Sat 16 May 2026
Plymouth, Devon, UK

Race The Tide | Long Half-Marathon

  • 15 miles trail running
  • Sun 17 May 2026
Keighley, West Yorkshire, UK

Sue Ryder Bronte Half Marathon

  • 13.1 miles multi terrain running + 1811 ft ascent

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