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Knebworth House, Old Knebworth Lane, Knebworth, Hertfordshire, United Kingdom
The Hertfordshire Half Marathon & 10K takes place on 1 November 2026 with both races starting and finishing at Knebworth House. The event is staged on a road-closed, traffic-free course through the historic Knebworth Park grounds and surrounding rural lanes, providing a scenic country setting framed by the house and estate. The organiser promotes a well-serviced race village and clear route information, with course maps available on the event site for competitor planning and spectators.
Two distances are offered — a half marathon and a 10K — and the event benefits Garden House Hospice Care as the official charity partner. Entries are chip-timed and the event page advertises a themed medal, post-race goodies and free race photos for participants. Practical guidance such as how to get there, route details and event-day logistics are provided on the official event pages to help competitors prepare.
