The ATW Watford Half Marathon & 10K is scheduled for February 1, 2026, continuing its legacy as one of Hertfordshire’s most popular races. Set from Cassiobury Park, the event offers three race options: a half marathon, a 10K, and a 1.8 km Family Fun Run for younger participants and families. The half marathon course weaves through charming countryside lanes and rural villages like Bucks Hill, Commonwood Common, and Chandlers Cross before returning to the park, all on fully closed roads. The 10K offers a flat and fast route alongside the Grand Union Canal towpath and wooded trails, ideal for PBs. With lively course entertainment, a bustling event village, and a £2,000 cash spot prize up for grabs, this event blends community spirit with competitive racing.
Races
Half Marathon
10k
The ATW Watford Half Marathon is scheduled for February 1, 2026, in Watford, Hertfordshire, and is organized by Active Training World. Featuring 229 meters of elevation gain, this scenic and challenging course loops through Cassiobury Park and the surrounding countryside.
The ATW Watford 10K takes place on February 1, 2026, in Watford, Hertfordshire, and is organized by Active Training World. With 55 meters of elevation gain, this 10K course offers a mix of park paths and country lanes, starting and finishing in Cassiobury Park.
Weather based on historical averages. Route data provided by Strava, based on last year's race.
FAQs
What is the ATW Watford Half Marathon?
How long is the ATW Watford Half Marathon?
Where does the ATW Watford Half Marathon take place?
What is the elevation gain of the ATW Watford Half Marathon?
How can I prepare for the ATW Watford Half Marathon?
How do I choose the right training plan for the ATW Watford Half Marathon?
The ATW Watford Half Marathon is scheduled for February 1, 2026, in Watford, Hertfordshire, and is organized by Active Training World. Featuring 229 meters of elevation gain, this scenic and challenging course loops through Cassiobury Park and the surrounding countryside.
The ATW Watford Half Marathon is 21km long.
The ATW Watford Half Marathon takes place in Watford, UK.
The ATW Watford Half Marathon elevation gain is 229 metres, which Runna classifies as a Moderate race.
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 ATW Watford Half Marathon?
The ATW Watford Half Marathon is scheduled for February 1, 2026, in Watford, Hertfordshire, and is organized by Active Training World. Featuring 229 meters of elevation gain, this scenic and challenging course loops through Cassiobury Park and the surrounding countryside.
How long is the ATW Watford Half Marathon?
The ATW Watford Half Marathon is 21km long.
Where does the ATW Watford Half Marathon take place?
The ATW Watford Half Marathon takes place in Watford, UK.
What is the elevation gain of the ATW Watford Half Marathon?
The ATW Watford Half Marathon elevation gain is 229 metres, which Runna classifies as a Moderate race.
How can I prepare for the ATW Watford Half Marathon?
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 ATW Watford Half Marathon?
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 ATW Watford 10K?
How long is the ATW Watford 10K?
Where does the ATW Watford 10K take place?
What is the elevation gain of the ATW Watford 10K?
How can I prepare for the ATW Watford 10K?
How do I choose the right training plan for the ATW Watford 10K?
The ATW Watford 10K takes place on February 1, 2026, in Watford, Hertfordshire, and is organized by Active Training World. With 55 meters of elevation gain, this 10K course offers a mix of park paths and country lanes, starting and finishing in Cassiobury Park.
The ATW Watford 10K is 10km long.
The ATW Watford 10K takes place in Watford, UK.
The ATW Watford 10K elevation gain is 55 metres, which Runna classifies as a Rolling race.
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 ATW Watford 10K?
The ATW Watford 10K takes place on February 1, 2026, in Watford, Hertfordshire, and is organized by Active Training World. With 55 meters of elevation gain, this 10K course offers a mix of park paths and country lanes, starting and finishing in Cassiobury Park.
How long is the ATW Watford 10K?
The ATW Watford 10K is 10km long.
Where does the ATW Watford 10K take place?
The ATW Watford 10K takes place in Watford, UK.
What is the elevation gain of the ATW Watford 10K?
The ATW Watford 10K elevation gain is 55 metres, which Runna classifies as a Rolling race.
How can I prepare for the ATW Watford 10K?
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 ATW Watford 10K?
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!
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Running
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Major City
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by ATW Watford Half Marathon & 10K or Active Training World (ATW). 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 ATW Watford Half Marathon & 10K website.
