The Big Half, inaugurated in 2018, is a prominent half marathon in London, UK, covering a 21.1 km course from Tower Bridge to the historic Cutty Sark in Greenwich. Scheduled for September 7, 2025, the event celebrates London's diversity and community spirit, drawing participants ranging from elite athletes to enthusiastic novices. The route showcases London's landmarks, including Canary Wharf and the Thames Barrier, offering both residents and visitors a unique way to experience the city. Organized by London Marathon Events, The Big Half has seen winners like Mo Farah and Kenenisa Bekele, highlighting its competitive edge.
Race
Half Marathon
Race Date:
07 September, 2025
The Big Half Half Marathon, held in London, draws 18,000 runners to a 21.1 km course that showcases the city’s iconic landmarks, from Tower Bridge to Greenwich. Known for its inclusive and community-focused atmosphere, this race brings together elite athletes, amateur runners, and local participants in a celebration of fitness and London’s vibrant spirit.
Weather based on historical averages. Route data provided by Strava, based on last year's race.
FAQs
What is the The Big Half Marathon?
How long is the The Big Half Marathon?
Where does the The Big Half Marathon take place?
What is the elevation gain of the The Big Half Marathon?
How can I prepare for the The Big Half Marathon?
How do I choose the right training plan for the The Big Half Marathon?
The Big Half Half Marathon, held in London, draws 18,000 runners to a 21.1 km course that showcases the city’s iconic landmarks, from Tower Bridge to Greenwich. Known for its inclusive and community-focused atmosphere, this race brings together elite athletes, amateur runners, and local participants in a celebration of fitness and London’s vibrant spirit.
The The Big Half Marathon is 21km long.
The The Big Half Marathon takes place in Tower Bridge, London, UK.
The The Big Half Marathon elevation gain is 80 metres, which Runna classifies as a Flat 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 The Big Half Marathon?
The Big Half Half Marathon, held in London, draws 18,000 runners to a 21.1 km course that showcases the city’s iconic landmarks, from Tower Bridge to Greenwich. Known for its inclusive and community-focused atmosphere, this race brings together elite athletes, amateur runners, and local participants in a celebration of fitness and London’s vibrant spirit.
How long is the The Big Half Marathon?
The The Big Half Marathon is 21km long.
Where does the The Big Half Marathon take place?
The The Big Half Marathon takes place in Tower Bridge, London, UK.
What is the elevation gain of the The Big Half Marathon?
The The Big Half Marathon elevation gain is 80 metres, which Runna classifies as a Flat race.
How can I prepare for the The Big 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 The Big 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!
More
Sport:
Running
Tags:
Major City
Relay
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by The Big Half or London Marathon Events. 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 The Big Half website.
