Ultramarathons in Hertfordshire
12 upcoming ultramarathons in Hertfordshire, United Kingdom.
6 cities
Busiest: October
From €38
Upcoming races
Your guide to ultramarathons in Hertfordshire, United Kingdom
There are 12 upcoming ultramarathons in Hertfordshire, United Kingdom, spread across 6 cities. Filter by distance or terrain to narrow things down, and save the races you like the look of.
Most take place in October, March and May. Next up is Chiltern Ridge Winter 50K in Berkhamsted on 31 October 2026.
Questions runners ask
How many ultramarathons in Hertfordshire, United Kingdom are there?
Finndu lists 12 upcoming ultramarathons in Hertfordshire, United Kingdom, across 6 towns and cities. The list is updated twice a day as organisers announce new races.
When is the next one?
Chiltern Ridge Winter 50K in Berkhamsted, on 31 October 2026.
Which month has the most ultramarathons in Hertfordshire, United Kingdom?
October, followed by March and May.
How much does it cost to enter?
Entry starts from £33. Fees vary from race to race, so check each race page for its current price.