Ultra runs in Hertfordshire
Find ultra runs 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
MapEvent listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Sat 23 - Sun 24 May
- £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.
- 5K run
- 10K run
- Half marathon
- Marathon
- Ultra run 2
- + 2 more races
- Sun 31 May
- £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?
- 5K run
- 10K run
- Half marathon
- Marathon
- 50K ultra run
- + 1 more race
- Sat 27 Jun
- £33-£38
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.
- 32 miles trail running
- Sun 25 Oct
- £35-£55
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.
- 30 miles trail running + 188 ft ascent
- Sun 19 Jul
- £23-£25
Fairlands Valley Challenge | 50K Ultra
- 50 km trail running
- Sat 31 Oct
- £73-£75
Chiltern Ridge Winter 50K
- 50 km trail running + 800 m ascent