Hertfordshire Half Marathon & 10k
Sunday, 1 November 2026 · Knebworth House, Old Knebworth Lane, Knebworth, UK
Event summary
Get ready for an exhilarating race experience at the Hertfordshire Half Marathon & 10K, organized by RunThrough Events! Mark your calendars for Sunday, 1st November 2026, as this vibrant event returns to the scenic backdrop of Knebworth, Hertfordshire. Runners of all abilities are invited to join in on the excitement, with both the Half Marathon (21.1 km) starting at 9:00 am and the 10K kicking off at 9:30 am. Set against the stunning Hertfordshire countryside, participants will enjoy undulating road routes that promise to challenge and inspire. Whether you're aiming for a personal best or are a first-timer stepping up to the distance, the welcoming atmosphere and enthusiastic support from marshals will make this event unforgettable. Don’t miss your chance to be part of this autumn challenge! Secure your spot now at our Early Bird Prices and prepare for a day filled with fun, fitness, and community spirit!
About this event
Join us for the Hertfordshire Half Marathon & 10K on Sunday 1st November 2026 The Hertfordshire Half Marathon & 10K 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. Book your spot now at our Early Bird Prices! Race Distances & Start Times 09:00 am - Half Marathon start Distances: 21.1m Cut-off: 3 Hours (12:00) 09: 30 am - 10k start Elevation: 92m, Road (undulating) Cut-off: 1.5 Hours (11:00)
Distances & Prices
| Distance | Price | Status |
|---|---|---|
| 10k | £40.00 | open |
| Half Marathon | £47.00 | open |
Timings
| Type | Time |
|---|---|
| Race start time | 09:00 |
What's included
Unique themed medal, Chip timed results, Free Race Photos, Refreshments and much more!
The course
There will be mile markers, arrows and marshals along the course to keep you on track. There will be three water stations at miles 3.5, 7.5 & 10 as well as at the finish.
The route
Getting there
By Car Knebworth House & Park can be accessed directly from the Junction 7 roundabout of the A1(M) motorway at Stevenage South, 29 miles north of London. There are signs on both carriageways of the motorway. If you are using a sat nav please use the postcode of the Stevenage Novotel at Junction 7 - SG1 2AX, not the Knebworth House postcode. There will be plenty of FREE parking available for all runners and spectators adjacent to the event village. Tube and Train The nearest rail station is Stevenage, two miles from Knebworth Park. There is a taxi rank at the station. Non-stop Inter-city and local services run to Stevenage station from London’s Kings Cross station around every 30 minutes. There are also frequent Inter-City connections on the East Coast main line from Cambridge, York, Leeds, Newcastle, Edinburgh and Glasgow. More information is available at www.tfl.gov.uk.
Gallery
Price rises soon
From £40.00
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