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Half marathons in Hertfordshire

Find half marathons near me in Hertfordshire for 2025/2026 - 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.

From the fantastic Ridlins Stadium athletics track, wind your way around superb traffic-free tarmac routes and enjoy the beautiful Fairlands Valley Park the return to a vibrant event village!
  • Mon 21 Apr
  • £33-£35
  • Mon 21 Apr
  • £33-£35
Stevenage, Hertfordshire, UK

ATW Stevenage Spring Half Marathon

From the fantastic Ridlins Stadium athletics track, wind your way around superb traffic-free tarmac routes and enjoy the beautiful Fairlands Valley Park the return to a vibrant event village!

  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running
Can you survive Farmmageddon? A fantastic half marathon through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.
  • Sat 24 May
  • £34-£36
  • Sat 24 May
  • £34-£36
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
In its fifth year! Come take on the challenge of the track at Wodson Park. Do you have it in you to complete your distance on a 400-metre athletics track?
  • Sun 1 Jun
  • £30-£32
  • Sun 1 Jun
  • £30-£32
Ware, Hertfordshire, UK

Circuit Du Sore Legs | Part Cinq | Half Marathon

In its fifth year! Come take on the challenge of the track at Wodson Park. Do you have it in you to complete your distance on a 400-metre athletics track?

  • Chip timing
  • Enter online
  • PB
  • Traffic free
  • Age 18 & over
  • 13.1 miles track and field
A community focused event, ATW St Albans Half Marathon aims to raise money for local charities and organisations as well as put on a great day out for all the family, delivered by runners for runners.
  • Sun 8 Jun
  • £37-£39
  • Sun 8 Jun
  • £37-£39
St Albans, Hertfordshire, UK

ATW St Albans Half Marathon

A community focused event, ATW St Albans Half Marathon aims to raise money for local charities and organisations as well as put on a great day out for all the family, delivered by runners for runners.

  • Chip timing
  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running
Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it.
  • Sat 28 Jun
  • £23-£37.50
  • Sat 28 Jun
  • £23-£37.50
Buntingford, Hertfordshire, UK

Cock-a-doodle Dawdle | 6 hour

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

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 18 & over
  • 6 hrs trail running
Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it.
  • Sat 28 Jun
  • £23-£37.50
  • Sat 28 Jun
  • £23-£37.50
Buntingford, Hertfordshire, UK

Cock-a-doodle Dawdle | 4 hour

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

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 18 & over
  • 4 hrs trail running
The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.
  • Sun 28 Sep
  • £30-£36
  • Sun 28 Sep
  • £30-£36
Welwyn Garden City, Hertfordshire, UK

ATW Welwyn Half Marathon

The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.

  • Chip timing
  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running
Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete a half marathon over multiple laps of the 400m circuit - and how fast you can do it.
  • Sat 1 Nov
  • £33-£35
  • Sat 1 Nov
  • £33-£35
Ware, Hertfordshire, UK

Catherine Wheel Canter | Half Marathon

Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete a half marathon over multiple laps of the 400m circuit - and how fast you can do it.

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 18 & over
  • 13.1 miles track and field
Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete a half marathon over multiple laps of the 400m circuit - and how fast you can do it.
  • Sat 1 Nov
  • £33-£35
  • Sat 1 Nov
  • £33-£35
Ware, Hertfordshire, UK

Guy Fawkes Gallop | Half Marathon

Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete a half marathon over multiple laps of the 400m circuit - and how fast you can do it.

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 18 & over
  • 13.1 miles track and field
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 2026
  • £27-£38
  • Sat 21 Mar 2026
  • £27-£38
Buntingford, Hertfordshire, UK

Moo-rathon, Calf and Hen K | 6 Hour

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

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 18 & over
  • 6 hrs trail running
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 2026
  • £27-£38
  • Sat 21 Mar 2026
  • £27-£38
Buntingford, Hertfordshire, UK

Moo-rathon, Calf and Hen K | 4 Hour

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.

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 18 & over
  • 4 hrs trail running
  • Sun 11 May
Letchworth Garden City, Hertfordshire, UK

The Greenway Challenge

  • 13 miles trail running
  • Sat 11 Oct
Tring, Hertfordshire, UK

Run the Wild Half Marathon - Autumn Edition

  • 21.1 km trail running

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