Hertfordshire Half Marathon & 10k
Sun 2nd November 2025
Hertfordshire Half Marathon & 10k
From RunThrough Events
- Date Sun 2nd November 2025
- Location Knebworth, Hertfordshire
- Price £32.00 - £172.00
- Races 3 races
- Distances 10km, Half Marathon
Top rated
This is a popular event
Event summary
Join RunThrough Events for the exciting return of the Hertfordshire Half Marathon & 10k on Sunday 2nd November 2025! This highly anticipated event will take place in the picturesque location of Knebworth, Hertfordshire, with participants starting and finishing in front of the stunning Knebworth House. The half marathon, which is completely road closed, will showcase the beautiful rural roads surrounding the area. Starting at 9:00am for the half marathon and 9:30am for the 10k, participants can look forward to receiving a brand new medal at the finish line. Knebworth House, a grade II listed house with lush gardens and parkland, has hosted legendary music concerts and offers attractions like an adventure playground and dinosaur trail. Entry includes a unique themed medal, chip timed results, free official race photos, refreshments, and more. Don't miss out on this fantastic event!
Organiser's Description
JOIN US FOR THE RETURN OF THE HERTFORDSHIRE HALF MARATHON & 10K ON SUNDAY 2ND NOVEMBER 2025!
This popular ROAD CLOSED half marathon starts and finishes in front of the iconic Knebworth House with the course taking participants around the beautiful surrounding rural roads.
Start Times:
Half Marathon – 9:00am
10k – 9:30am
BRAND NEW MEDAL TO BE REVEALED!
Knebworth House is a grade II listed house set in acres of beautiful gardens and parkland. Knebworth House has welcomed many music artists for major open air concerts, including Robbie Williams, Oasis, Led Zepellin and Red Hot Chilli Peppers. The grounds are home to popular tourist attractions including an adventure playground and dinosaur trail.
Included in the entry is:
a unique themed medal,
chip timed results,
free official race photos,
refreshments
and much more!
This popular ROAD CLOSED half marathon starts and finishes in front of the iconic Knebworth House with the course taking participants around the beautiful surrounding rural roads.
Start Times:
Half Marathon – 9:00am
10k – 9:30am
BRAND NEW MEDAL TO BE REVEALED!
Knebworth House is a grade II listed house set in acres of beautiful gardens and parkland. Knebworth House has welcomed many music artists for major open air concerts, including Robbie Williams, Oasis, Led Zepellin and Red Hot Chilli Peppers. The grounds are home to popular tourist attractions including an adventure playground and dinosaur trail.
Included in the entry is:
a unique themed medal,
chip timed results,
free official race photos,
refreshments
and much more!
Races
-
10k
£32.00
Booking for more than 1? -
Half Marathon
£36.00
Booking for more than 1? -
Group Booking
£172.00
Course Details
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.
Reviews
- 5
- 4
- 3
- 2
- 1
4.5
11 reviews
The run itself was great. A lovely scenic and smooth course I ran my quickest 10k for a few years.
However I was a bit frustrated to arrive at 9am for the 9:30 am start to find I could drive into the estate because the half marathon route meant the roads were closed. It meant a long walk in to the event village. Hundreds of people had a similar problem. If the instructions said I needed to arrive by say 8:45 to be able drive in then I would have.
Hilly. This one is in the grounds of Knebworth, you will be finishing outside the castle.
The route is a little hilly, you will be running in and out of the grounds.
Aim to be there earlier than a normal race due to the single track car entrance.
There is car parking on site, which is a field of long grass.
The goodie bag had to be THE best of all my half marathons, it included a large bag of bath salts, excellent!
Crowd support is really only at the end.
Sam
·4 years ago
Very well organised event. Great race and very enjoyable atmosphere. Very hilly but would highly recommend.
Tom
·4 years ago
Very well organised - but a bit hilly. Ran this yesterday - would do it again and most of it was fantastic - but the hill finish really made the finish line seem far away!!
Great first half marathon event. Had a really great time running my first half marathon. It was well organised with e-mails and race pack ahead of the day, all the event staff were friendly and cheerful and there were lots of food stalls etc. at the finish. I hope to do it again next year!
Congrats on your first half!!
Hertfordshire Half Marathon & 10k