Hertfordshire Half Marathon
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Event overview
The Hertfordshire Half Marathon & 10K is scheduled for Sunday 1 November 2026 in Old Knebworth Lane, Knebworth, UK. The event is organised by RunThrough and registration is open.
Race details and inclusions
Both races follow undulating road routes through the Hertfordshire countryside.
- Half Marathon (21.1m)
- 10K
Elevation is listed as 218 m for the Half Marathon and 92 m for the 10K. Cut-off times are 3 hours for the Half Marathon and 1.5 hours for the 10K. Entries include a unique themed medal, chip-timed results, post-race goodies, and free race photos. A RunThrough Kit technical T-shirt with the Hertfordshire logo is available for an additional £12. Published entry fees include: 10K £38, Half Marathon £45, 10K with T-shirt £50, Half Marathon with T-shirt £57, and a group booking option (6 places) at £210. The event features marshals on the course, an event village with food and drink options, and partner-provided finish-line items. Visit the organization's website for the most recent information.