As the traditional Easter opener in the Ultra Challenge series, the Windsor 50 Ultra Challenge launches on 18 April 2026 from Windsor Racecourse. Participants navigate a figure‑of‑eight course—two 25 km loops—with panoramic views of Windsor Castle, historic Runnymede, and peaceful stretches of the Thames Path. The 50 km Ultra carries around 320 m of elevation gain, while shorter legs (25 km and 10 km) offer lower elevation options for varied fitness levels. Ultra Challenge provides comprehensive support—covered rest stops with food, drinks, massage and medical aid; GPS route tracking; snacks at strategic points; race categories like Ultra March (walkers) and Trailblazerz (fast runners)—plus a celebratory finish with medal, T‑shirt, hot meal or picnic, and glass of fizz. A lively basecamp experience includes transfers, camping, and post-race celebrations.
Races
50 km
25 km
10 km
The 50 km race, hosted by Action Challenge Ltd, is set for Saturday, 18 April 2026, starting and finishing at Windsor Racecourse, navigating two looped circuits via historic Windsor Castle views, Runnymede, and riverside paths—rising approximately 320 meters.
The 25 km route, also organized by Action Challenge Ltd, takes place on 18 April 2026, from Windsor Racecourse, offering one scenic loop past Runnymede, through the Great Park, and back to the finish—totaling around 175 meters of ascent.
The 10 km challenge, staged by Action Challenge Ltd, is scheduled for Saturday, 18 April 2026, starting from Windsor Racecourse, featuring a flat family‑friendly loop around Eton and the Thames path, with just 25 meters of climbing.
Weather based on historical averages.
FAQs
What is the Windsor 50 km?
How long is the Windsor 50 km?
Where does the Windsor 50 km take place?
What is the elevation gain of the Windsor 50 km?
How can I prepare for the Windsor 50 km?
How do I choose the right training plan for the Windsor 50 km?
The 50 km race, hosted by Action Challenge Ltd, is set for Saturday, 18 April 2026, starting and finishing at Windsor Racecourse, navigating two looped circuits via historic Windsor Castle views, Runnymede, and riverside paths—rising approximately 320 meters.
The Windsor 50 km is 50km long.
The Windsor 50 km takes place in Windsor, UK.
The Windsor 50 km elevation gain is 320 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 Windsor 50 km?
The 50 km race, hosted by Action Challenge Ltd, is set for Saturday, 18 April 2026, starting and finishing at Windsor Racecourse, navigating two looped circuits via historic Windsor Castle views, Runnymede, and riverside paths—rising approximately 320 meters.
How long is the Windsor 50 km?
The Windsor 50 km is 50km long.
Where does the Windsor 50 km take place?
The Windsor 50 km takes place in Windsor, UK.
What is the elevation gain of the Windsor 50 km?
The Windsor 50 km elevation gain is 320 metres, which Runna classifies as a Rolling race.
How can I prepare for the Windsor 50 km?
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 Windsor 50 km?
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 Windsor 25 km?
How long is the Windsor 25 km?
Where does the Windsor 25 km take place?
What is the elevation gain of the Windsor 25 km?
How can I prepare for the Windsor 25 km?
How do I choose the right training plan for the Windsor 25 km?
The 25 km route, also organized by Action Challenge Ltd, takes place on 18 April 2026, from Windsor Racecourse, offering one scenic loop past Runnymede, through the Great Park, and back to the finish—totaling around 175 meters of ascent.
The Windsor 25 km is 25km long.
The Windsor 25 km takes place in Windsor, UK.
The Windsor 25 km elevation gain is 175 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 Windsor 25 km?
The 25 km route, also organized by Action Challenge Ltd, takes place on 18 April 2026, from Windsor Racecourse, offering one scenic loop past Runnymede, through the Great Park, and back to the finish—totaling around 175 meters of ascent.
How long is the Windsor 25 km?
The Windsor 25 km is 25km long.
Where does the Windsor 25 km take place?
The Windsor 25 km takes place in Windsor, UK.
What is the elevation gain of the Windsor 25 km?
The Windsor 25 km elevation gain is 175 metres, which Runna classifies as a Rolling race.
How can I prepare for the Windsor 25 km?
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 Windsor 25 km?
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 Windsor 10 km?
How long is the Windsor 10 km?
Where does the Windsor 10 km take place?
What is the elevation gain of the Windsor 10 km?
How can I prepare for the Windsor 10 km?
How do I choose the right training plan for the Windsor 10 km?
The 10 km challenge, staged by Action Challenge Ltd, is scheduled for Saturday, 18 April 2026, starting from Windsor Racecourse, featuring a flat family‑friendly loop around Eton and the Thames path, with just 25 meters of climbing.
The Windsor 10 km is 10km long.
The Windsor 10 km takes place in Windsor, UK.
The Windsor 10 km elevation gain is 25 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 Windsor 10 km?
The 10 km challenge, staged by Action Challenge Ltd, is scheduled for Saturday, 18 April 2026, starting from Windsor Racecourse, featuring a flat family‑friendly loop around Eton and the Thames path, with just 25 meters of climbing.
How long is the Windsor 10 km?
The Windsor 10 km is 10km long.
Where does the Windsor 10 km take place?
The Windsor 10 km takes place in Windsor, UK.
What is the elevation gain of the Windsor 10 km?
The Windsor 10 km elevation gain is 25 metres, which Runna classifies as a Rolling race.
How can I prepare for the Windsor 10 km?
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 Windsor 10 km?
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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This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Windsor 50 Ultra Challenge 2026 or Action Challenge Ltd. 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 Windsor 50 Ultra Challenge 2026 website.
