Hertfordshire Half Marathon
& 10K
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.
Race Distances & Start Times
09:00 am - Half Marathon start
Elevation: 218m, Road (undulating)
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)
Included In The Entry
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Unique Themed Medal
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Chip Timed Results
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Post-race goodies
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Free Race Photos
Each kilometre is accurately marked with distance flags and our friendly marshals will guide and cheer you all the way to the finish. We cannot wait to welcome you to Hertfordshire!
With RunThrough you can expect a friendly team of marshals to help guide you round the course and cheer you on to the finish, a lively and well-serviced event village with plenty of food and drink options including free goodies from our partners at the finish line after your hard effort.
We have been extensively researching what runners consider important, and sustainability is fast becoming the top issue. Click here to see what RunThrough is doing for sustainability.
Please Note:
This is the registration page for your fundrasing page set up. If you have not yet signed up to the race itself on RunThrough's website, please ensure to do this. That will secure your entry to the race.
Click here to head over to RunThorugh's Reace Registration.
