Ultra runs in Hertfordshire
Find ultra runs in Hertfordshire in 2025/2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sat 23 - Sun 24 May 2026
- £33-£165
Farmmageddon
Can you survive Farmmageddon? You have 32 hours to complete 100 miles over a fantastic 5.3K loop through the lovely grounds of Hyde Hall Farm. 24-hour or shorter distance options too.
- Newcomers
- Event village
- Rural
- Age 18 & over
- 5K run
- 10K run
- Half marathon
- Marathon
- Ultra run 2
- + 2 more races
- Sun 31 May 2026
- £27-£38
Circuit Du Sore Legs
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?
- Families
- Newcomers
- Event village
- Park
- Age 14 & over
- 5K run
- 10K run
- Half marathon
- Marathon
- 50K ultra run
- + 1 more race
- Sat 27 Jun 2026
- £33-£35
Cock-a-doodle Dawdle | Ultra Marathon
Join like-minded runners doing different distances, starting from the base camp of Hyde Hall Farm and encompassing the beautiful grounds around it over a lovely looped ultra trail route.
- Enter online
- Undulating
- Age 18 & over
- 32 miles trail running + 164 ft ascent
- Sun 25 Oct 2026
- £35
Stort30
A stunningly pretty 30-mile out-and-back ultra on the border of Hertfordshire and Essex along the River Stort and Lee navigation. A great first foray into ultra running or a fast competitive race.
- Newcomers
- Chip timing
- Enter online
- Flat
- Event village
- Rural
- Age 18 & over
- 30 miles trail running + 188 ft ascent
- Sun 19 Jul 2026
Fairlands Valley Challenge | 50K Ultra
- 50 km trail running
- Sat 31 Oct 2026
Chiltern Ridge Winter 50K
- 50 km trail running + 800 m ascent