RunThrough Hertfordshire Half Marathon & 10k
Knebworth House, Knebworth, Hertfordshire
Event details
The Hertfordshire Half Marathon & 10K in support of Garden House Hospice returns for 2026, and registration is now OPEN! Taking place on Sunday 1st November, this exciting event is set in beautiful Old Knebworth, offering runners of all abilities a memorable race experience. Both races feature undulating, scenic road routes through the picturesque Hertfordshire countryside. Whether you're tackling the Half Marathon or the 10K, you'll enjoy a welcoming race-day atmosphere, excellent support from marshals, and clear route markings. It's the perfect autumn challenge for seasoned runners aiming for a new PB or first-timers stepping up their distance.
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RunThrough Hertfordshire Half Marathon & 10k runs on Sunday 1st November 2026 at Knebworth House, Knebworth, Hertfordshire, part of a UK-wide calendar of road running events kept up to date on this site. Details here are a summary - always confirm entry requirements, cut-off times and parking directly with the organiser before setting off. Browse the full events calendar for what else is on around the same date.