Hertfordshire Half Marathon

NOV
1
2026
Experience the scenic beauty of Old Knebworth with an undulating road race through the Hertfordshire countryside. Choose between a half marathon or 10K and enjoy a professional event complete with chip timing and themed medals.
Sun 1 Nov 2026
Half Marathon 10 kilometers

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Hertfordshire Half Marathon & 10K

The Hertfordshire Half Marathon and 10K takes place in Old Knebworth, United Kingdom. This autumn event features road routes through the Hertfordshire countryside. The courses are described as undulating and scenic, providing a tour of the local landscape.

Participants can choose between two race distances:

  • Half Marathon: A 21.1 km route with an elevation gain of 218 meters and a 3-hour cut-off time.
  • 10 km: A road race with an elevation gain of 92 meters and a 1.5-hour cut-off time.

The event follows accurate kilometer markings with distance flags and support from marshals stationed along the route. The organization provides chip-timed results for all runners. The race-day experience includes an event village with various food and drink options.

Each entry includes a unique themed medal, post-race goodies, and free race photos. Participants have the option to purchase an event t-shirt with the race logo during registration. This event supports Garden House Hospice Care, an organization providing specialist palliative care across North Hertfordshire, Stevenage, and surrounding areas. Visit the organization's website for the most recent information.

Half Marathon
Half Marathon
10 km
10k
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