Set in the picturesque grounds of Knebworth House, the Hertfordshire Half Marathon & 10K is scheduled for Sunday, 2 November 2025. The event features two race distances: a Half Marathon starting at 9:00 AM and a 10K commencing at 9:30 AM. Runners will experience a fully closed-road course that winds through the beautiful rural roads surrounding the estate. Participants will receive a unique themed medal, chip-timed results, free official race photos, and refreshments. The event supports Garden House Hospice Care, adding a charitable aspect to this popular race.   
Races
Half Marathon
10km
Race Date:
02 November, 2025
The Hertfordshire Half Marathon will take place on Sunday, 2 November 2025, starting at 9:00 AM at Knebworth House in Stevenage, UK. Organized by RunThrough, this road-closed 13.1-mile race guides runners through the scenic grounds of Knebworth Park and the surrounding countryside, offering a challenging yet picturesque course.  
Weather based on historical averages.
FAQs
What is the Hertfordshire Half Marathon November 2025?
How long is the Hertfordshire Half Marathon November 2025?
Where does the Hertfordshire Half Marathon November 2025 take place?
What is the elevation gain of the Hertfordshire Half Marathon November 2025?
How can I prepare for the Hertfordshire Half Marathon November 2025?
How do I choose the right training plan for the Hertfordshire Half Marathon November 2025?
The Hertfordshire Half Marathon will take place on Sunday, 2 November 2025, starting at 9:00 AM at Knebworth House in Stevenage, UK. Organized by RunThrough, this road-closed 13.1-mile race guides runners through the scenic grounds of Knebworth Park and the surrounding countryside, offering a challenging yet picturesque course.  
The Hertfordshire Half Marathon November 2025 is 21km long.
The Hertfordshire Half Marathon November 2025 takes place in Knebworth, UK.
Runna classifies the Hertfordshire Half Marathon November 2025 elevation profile as Rolling.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Hertfordshire Half Marathon November 2025?
The Hertfordshire Half Marathon will take place on Sunday, 2 November 2025, starting at 9:00 AM at Knebworth House in Stevenage, UK. Organized by RunThrough, this road-closed 13.1-mile race guides runners through the scenic grounds of Knebworth Park and the surrounding countryside, offering a challenging yet picturesque course.  
How long is the Hertfordshire Half Marathon November 2025?
The Hertfordshire Half Marathon November 2025 is 21km long.
Where does the Hertfordshire Half Marathon November 2025 take place?
The Hertfordshire Half Marathon November 2025 takes place in Knebworth, UK.
What is the elevation gain of the Hertfordshire Half Marathon November 2025?
Runna classifies the Hertfordshire Half Marathon November 2025 elevation profile as Rolling.
How can I prepare for the Hertfordshire Half Marathon November 2025?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Hertfordshire Half Marathon November 2025?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Fun Run
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Hertfordshire Half Marathon & 10k November 2025 or RunThrough. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Hertfordshire Half Marathon & 10k November 2025 website.
