50K ultra runs in Hertfordshire
Find 50k ultra runs 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
- Entries close soon
- Sat 24 May
- £34-£36
- Entries close soon
Farmmageddon | Ultra Marathon
Can you survive Farmmageddon? Run an ultra over a fantastic 5.3K loop through the lovely grounds of Hyde Hall Farm as part of the Farmmageddon endurance weekend.
- Enter online
- Undulating
- Traffic free
- Age 18 & over
- 32 miles trail running
- Sun 1 Jun
- £35.50-£37.50
- Sun 1 Jun
- £35.50-£37.50
Circuit Du Sore Legs | Part Cinq | Ultra 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
- Flat
- PB
- Traffic free
- Age 18 & over
- 50 km track and field
- Sat 1 Nov
- £35.50-£37.50
- Sat 1 Nov
- £35.50-£37.50
Catherine Wheel Canter | Ultra Marathon
Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete more than a marathon over multiple laps of the 400m circuit.
- Chip timing
- Enter online
- Flat
- Traffic free
- Age 18 & over
- 50 km track and field
- Sat 1 Nov
- £35.50-£37.50
- Sat 1 Nov
- £35.50-£37.50
Guy Fawkes Gallop | Ultra Marathon
Welcome to the Fireworks Festival of Running! Come and tackle the track to see whether you can complete more than a marathon over multiple laps of the 400m circuit.
- Chip timing
- Enter online
- Flat
- Traffic free
- Age 18 & over
- 50 km track and field