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.
- Sat 24 May
- £34-£36
- Sat 24 May
- £34-£36
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
- Sun 1 Jun
- £30-£32
- Sun 1 Jun
- £30-£32
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
- Sun 8 Jun
- £37-£39
- Sun 8 Jun
- £37-£39
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
- Sat 28 Jun
- £23-£37.50
- Sat 28 Jun
- £23-£37.50
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
- Sat 28 Jun
- £23-£37.50
- Sat 28 Jun
- £23-£37.50
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
- Sun 28 Sep
- £30-£36
- Sun 28 Sep
- £30-£36
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
- Sat 1 Nov
- £33-£35
- Sat 1 Nov
- £33-£35
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
- Sat 1 Nov
- £33-£35
- Sat 1 Nov
- £33-£35
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
- Sat 21 Mar 2026
- £27-£38
- Sat 21 Mar 2026
- £27-£38
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
- Sat 21 Mar 2026
- £27-£38
- Sat 21 Mar 2026
- £27-£38
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
- Sat 11 Oct
Run the Wild Half Marathon - Autumn Edition
- 21.1 km trail running