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Hertfordshire Half Marathon & 10k - November 2025

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Hertfordshire Half Marathon & 10k - November 2025
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Race around the historic Knebworth House in the Hertfordshire Half Marathon & 10k. Great for runners of all stripes, the route starts at the stately home before taking you onto the surrounding country roads. Come for the beautiful rural setting or for your first half marathon.
Half Marathon, Group of 6 , Half Marathon inc T-Shirt (£12), and 2 more
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Sun, 2 Nov 2025
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Stevenage, United Kingdom
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(159 Reviews)
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Where and when
Old Knebworth Ln, Stevenage SG1 2AX, UK
Start times
Sunday, 2 Nov 2025
Half Marathon: 9:00 amGroup of 6 : 9:00 amHalf Marathon inc T-Shirt (£12): 9:00 am10k: 9:30 am10k inc T-Shirt (£12): 9:30 am
Event summary
Here are the distances available for Hertfordshire Half Marathon & 10k - November 2025
Half Marathon
Group of 6
Half Marathon inc T-Shirt (£12)
Route information
This course will take runners through the natural grounds and parklands of Knebworth House. This grade II listed estate has welcomed many music artists for major open-air concerts, including Robbie Williams, Oasis, Led Zepellin, and Red Hot Chilli Peppers.
Each mile will be accurately signposted with clear distance markers, showing you how far you've come and how far you have to go. There will also be marshals stationed around the course to guide you in the right direction, as well as cheer you on.
Organiser route images
What's included
  • Finisher's Medal
  • Chip-timed results
  • Marshalled course
  • Aid station
  • Bag drop
  • Free event photography
How to get there
Old Knebworth Ln, Stevenage SG1 2AX, UK
Get full directionsExternalLink
There is plenty of free parking available adjacent to the event village.
By Train
Stevenage is the closest train station to the start location, situated 2.3 miles away. This distance would take roughly 50 minutes to walk. Alternatively, ride the number 8 bus (towards Bragbury End), alighting at Roebuck Gate. The start location is then a short 15-minute walk away.
Event day logistics
09:00 Half Marathon starts
09:30 10k starts
*Please arrive early, allowing plenty of time to collect your race pack, attach your race number, drop your bag and warm up.
Race Pack
Race Packs must be collected on the day of the event, before the start of your race, from registration. Please be aware that you will not receive anything in the post.
Age Requirements
There are age requirements for the following races:
  • 10k - 15 or over
  • Half Marathon - 17 and over
Bag Drop
There will be a secure area where bags can be left, though it is recommended that you bring as little baggage as possible. Your bag tag is attached to your race number which you can tear off and attach to your bag.
It is not recommended that you wear headphones during the race so you stay alert to what is going on around you and hear the encouragement from marshals and spectators. There will also be pedestrians on the paths you'll be running who you'll need to be aware of.
Race Results
Your race timings will be published on the RunThrough results page after the race.
Race start
After the warm-up, estimated finish times will be called to the starting pen where the marshals will guide you to the start.
The Finish
Do not stop in the finish area, continue through the finish until you pass the medals and are in an open space.
Spectator Info
This is a fantastic race for spectators who can station themselves at Knebworth House for the start and finish line.
Supporters can cheer on the athletes while also appreciating the 15th Century stately home in all its grandeur.
How can I access my results for the Hertfordshire Half Marathon & 10k?
Results will be available on www.runthrough.co.uk after the race.
Will there be a bag drop at the Hertfordshire Half Marathon & 10k?
Yes, there will be a bag drop facility at this event. All bags and belongings will be left with a volunteer marshal. It is advised to not leave valuables in your bag.
How old do I need to be to enter the Hertfordshire Half Marathon & 10k?
10k runners must be 15 years of age or older and Half Marathon runners must be 17 years of age or older.
159 reviews
SceneryStunning scenery
FriendlyFaceFriendly atmosphere
FamilyFamily friendly

Early bird entry - ends soon

Early bird entry - ends soon

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