Half marathons in Hertfordshire
Find 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.
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- Sat 23 May
- £33-£38
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
- Sun 31 May
- £34-£36
Circuit Du Sore Legs | Half Marathon
In its sixth 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?
- 13.1 miles track and field
- Sun 14 Jun
- £39-£41
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.
- 13.1 miles road running + 699 ft ascent
- Sat 27 Jun
- £27-£38
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
- Sun 4 Oct
- £39-£41
- Early bird
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.
- 13.1 miles road running + 400 ft ascent
- Sat 31 Oct
- £34-£36
Halloween Hobble | Half Marathon
Dress up, run under the stars and push your limits, from a spooky 5K to a 12-hour track challenge, with free parking, cake, and music all day.
- 13.1 miles track and field
- Sun 7 Feb 2027
- From £30
ATW Watford Half Marathon
This popular event has a strong history within the running community and has been taking place for over 40 years! Join a day of running, community spirit and exciting experiences. Spot £2000 prize!
- 13.1 miles road running + 751 ft ascent
- Sun 10 May
- £20-£22
The Greenway Challenge
- 13 miles trail running
- Sun 7 Jun
- £32
Hitchin Hard Half Marathon, Tough Ten Miler and Fierce 5 Miler and Kids Fun Run | Hitchin Hard Half Marathon
- 13.1 miles road running
- Sun 19 Jul
- £23-£25
Fairlands Valley Challenge | Half Marathon
- 13.1 miles trail running