8

Trail Half marathons in Hertfordshire

Find trail half marathons in Hertfordshire in 2026/2027 - 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.

Marathon, Half and 10K! Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it.
  • Sat 21 Mar
  • £27-£38
Buntingford, Hertfordshire, UK

Moo-rathon, Calf and Hen K

Marathon, Half and 10K! Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it.

  • Multi-terrain run 2
  • Beginner-friendly
  • Dogs allowed at venue
  • Event village
  • Age 18 & over
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
  • £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.

  • 13.1 miles trail running + 656 ft ascent
  • Chip timing
  • Enter online
  • Traffic free
  • Age 18 & over
Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it.
  • Sat 27 Jun
  • £27-£38
Buntingford, Hertfordshire, UK

Cock-a-doodle Dawdle

Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it.

  • Multi-terrain run 2
  • 5K run
  • 10K run
  • Trail run
  • Half marathon 2
  • Beginner-friendly
  • Dogs allowed at venue
  • Event village
  • Rural
  • Age 14 & over
  • Sat 28 Mar
  • £55
Tring, Hertfordshire, UK

Run the Wild Half Marathon - Spring Edition

  • 21.1 km trail running + 300 m ascent
  • Sun 10 May
  • £20-£22
Letchworth Garden City, Hertfordshire, UK

The Greenway Challenge

  • 13 miles trail running
  • Sun 19 Jul
  • £23-£25
Stevenage, Hertfordshire, UK

Fairlands Valley Challenge | Half Marathon

  • 13.1 miles trail 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.