Taking place on April 18, 2026, the Spring Trail Series by Ultra X is a celebration of off-road running through the rolling greensand hills and rare lowland heath of the South Downs. Runners can choose from 12 km to 110 km distances, with all routes starting and finishing at the Cowdray Estate, where a vibrant event village offers food, drink, camping, and entertainment. The 25 km, 50 km, and 110 km distances are UTMB®-indexed, making this event a popular choice for both seasoned trail racers and those aiming to earn qualification points. Participants benefit from fully marked courses, aid stations with warm refreshments, GPS tracking, and generous cut-off times (~2–3 hours per 10 km). Whether chasing a new challenge or enjoying the social energy of the South Downs, this race delivers a professionally organized, inclusive ultra experience in a stunning natural setting.
Races
110 km
50 Miles
50 km
25 km
12 km
Beginning at 5:00 AM, the 110 km ultra ventures on an extended, UTMB®-indexed loop through Surrey’s hills and woodlands. Hosted by Ultra X, runners tackle the same stunning terrain with generous cutoffs, support stations, and an unforgettable trail-running challenge.
Starting at 7:00 AM, the 50‑Mile race doubles the 50 km route, offering a pro-level ultra experience around the Serpent Trail. Organized by Ultra X, this UTMB®-indexed race features a single massive loop and full logistical support.
The 50 km race starts at 9:00 AM on April 18, 2026, organized by Ultra X, challenges runners with a full single-loop course through undulating hills, heaths, and woodlands, complete with checkpoints and aid stations.
The 25 km event begins at 11:00 AM as well, covering a longer section of the Serpent Trail, organized by Ultra X, and featuring one loop through rolling hills and forest scenery.
The 12 km race starts at 11:00 AM on April 18, 2026, at Cowdray Estate in the South Downs National Park, hosted by Ultra X. This beginner-friendly loop travels through heathland, woodlands, and riverside trails, offering scenic short-distance trail running with full course markings and aid stations.
Weather based on historical averages.
FAQs
What is the Spring Trail Series 110km?
How long is the Spring Trail Series 110km?
Where does the Spring Trail Series 110km take place?
What is the elevation gain of the Spring Trail Series 110km?
How can I prepare for the Spring Trail Series 110km?
How do I choose the right training plan for the Spring Trail Series 110km?
Beginning at 5:00 AM, the 110 km ultra ventures on an extended, UTMB®-indexed loop through Surrey’s hills and woodlands. Hosted by Ultra X, runners tackle the same stunning terrain with generous cutoffs, support stations, and an unforgettable trail-running challenge.
The Spring Trail Series 110km is 110km long.
The Spring Trail Series 110km takes place in South Down National Park, Midhurst, UK.
The Spring Trail Series 110km elevation gain is 1563 meters, which Runna classifies as a Moderate race.
The best way to train for the next race is to use a personalized 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 personalized 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 Spring Trail Series 110km?
Beginning at 5:00 AM, the 110 km ultra ventures on an extended, UTMB®-indexed loop through Surrey’s hills and woodlands. Hosted by Ultra X, runners tackle the same stunning terrain with generous cutoffs, support stations, and an unforgettable trail-running challenge.
How long is the Spring Trail Series 110km?
The Spring Trail Series 110km is 110km long.
Where does the Spring Trail Series 110km take place?
The Spring Trail Series 110km takes place in South Down National Park, Midhurst, UK.
What is the elevation gain of the Spring Trail Series 110km?
The Spring Trail Series 110km elevation gain is 1563 meters, which Runna classifies as a Moderate race.
How can I prepare for the Spring Trail Series 110km?
The best way to train for the next race is to use a personalized 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 Spring Trail Series 110km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Spring Trail Series 50 Miler?
How long is the Spring Trail Series 50 Miler?
Where does the Spring Trail Series 50 Miler take place?
What is the elevation gain of the Spring Trail Series 50 Miler?
How can I prepare for the Spring Trail Series 50 Miler?
How do I choose the right training plan for the Spring Trail Series 50 Miler?
Starting at 7:00 AM, the 50‑Mile race doubles the 50 km route, offering a pro-level ultra experience around the Serpent Trail. Organized by Ultra X, this UTMB®-indexed race features a single massive loop and full logistical support.
The Spring Trail Series 50 Miler is 80km long.
The Spring Trail Series 50 Miler takes place in South Down National Park, Midhurst, UK.
Runna classifies the Spring Trail Series 50 Miler elevation profile as Moderate.
The best way to train for the next race is to use a personalized 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 personalized 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 Spring Trail Series 50 Miler?
Starting at 7:00 AM, the 50‑Mile race doubles the 50 km route, offering a pro-level ultra experience around the Serpent Trail. Organized by Ultra X, this UTMB®-indexed race features a single massive loop and full logistical support.
How long is the Spring Trail Series 50 Miler?
The Spring Trail Series 50 Miler is 80km long.
Where does the Spring Trail Series 50 Miler take place?
The Spring Trail Series 50 Miler takes place in South Down National Park, Midhurst, UK.
What is the elevation gain of the Spring Trail Series 50 Miler?
Runna classifies the Spring Trail Series 50 Miler elevation profile as Moderate.
How can I prepare for the Spring Trail Series 50 Miler?
The best way to train for the next race is to use a personalized 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 Spring Trail Series 50 Miler?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Spring Trail Series 50km?
How long is the Spring Trail Series 50km?
Where does the Spring Trail Series 50km take place?
What is the elevation gain of the Spring Trail Series 50km?
How can I prepare for the Spring Trail Series 50km?
How do I choose the right training plan for the Spring Trail Series 50km?
The 50 km race starts at 9:00 AM on April 18, 2026, organized by Ultra X, challenges runners with a full single-loop course through undulating hills, heaths, and woodlands, complete with checkpoints and aid stations.
The Spring Trail Series 50km is 50km long.
The Spring Trail Series 50km takes place in South Down National Park, Midhurst, UK.
Runna classifies the Spring Trail Series 50km elevation profile as Moderate.
The best way to train for the next race is to use a personalized 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 personalized 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 Spring Trail Series 50km?
The 50 km race starts at 9:00 AM on April 18, 2026, organized by Ultra X, challenges runners with a full single-loop course through undulating hills, heaths, and woodlands, complete with checkpoints and aid stations.
How long is the Spring Trail Series 50km?
The Spring Trail Series 50km is 50km long.
Where does the Spring Trail Series 50km take place?
The Spring Trail Series 50km takes place in South Down National Park, Midhurst, UK.
What is the elevation gain of the Spring Trail Series 50km?
Runna classifies the Spring Trail Series 50km elevation profile as Moderate.
How can I prepare for the Spring Trail Series 50km?
The best way to train for the next race is to use a personalized 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 Spring Trail Series 50km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Spring Trail Series 25km?
How long is the Spring Trail Series 25km?
Where does the Spring Trail Series 25km take place?
What is the elevation gain of the Spring Trail Series 25km?
How can I prepare for the Spring Trail Series 25km?
How do I choose the right training plan for the Spring Trail Series 25km?
The 25 km event begins at 11:00 AM as well, covering a longer section of the Serpent Trail, organized by Ultra X, and featuring one loop through rolling hills and forest scenery.
The Spring Trail Series 25km is 25km long.
The Spring Trail Series 25km takes place in South Down National Park, Midhurst, UK.
Runna classifies the Spring Trail Series 25km elevation profile as Moderate.
The best way to train for the next race is to use a personalized 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 personalized 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 Spring Trail Series 25km?
The 25 km event begins at 11:00 AM as well, covering a longer section of the Serpent Trail, organized by Ultra X, and featuring one loop through rolling hills and forest scenery.
How long is the Spring Trail Series 25km?
The Spring Trail Series 25km is 25km long.
Where does the Spring Trail Series 25km take place?
The Spring Trail Series 25km takes place in South Down National Park, Midhurst, UK.
What is the elevation gain of the Spring Trail Series 25km?
Runna classifies the Spring Trail Series 25km elevation profile as Moderate.
How can I prepare for the Spring Trail Series 25km?
The best way to train for the next race is to use a personalized 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 Spring Trail Series 25km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Spring Trail Series 12km?
How long is the Spring Trail Series 12km?
Where does the Spring Trail Series 12km take place?
What is the elevation gain of the Spring Trail Series 12km?
How can I prepare for the Spring Trail Series 12km?
How do I choose the right training plan for the Spring Trail Series 12km?
The 12 km race starts at 11:00 AM on April 18, 2026, at Cowdray Estate in the South Downs National Park, hosted by Ultra X. This beginner-friendly loop travels through heathland, woodlands, and riverside trails, offering scenic short-distance trail running with full course markings and aid stations.
The Spring Trail Series 12km is 12km long.
The Spring Trail Series 12km takes place in South Down National Park, Midhurst, UK.
The Spring Trail Series 12km elevation gain is 130 meters, which Runna classifies as a Moderate race.
The best way to train for the next race is to use a personalized 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 personalized 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 Spring Trail Series 12km?
The 12 km race starts at 11:00 AM on April 18, 2026, at Cowdray Estate in the South Downs National Park, hosted by Ultra X. This beginner-friendly loop travels through heathland, woodlands, and riverside trails, offering scenic short-distance trail running with full course markings and aid stations.
How long is the Spring Trail Series 12km?
The Spring Trail Series 12km is 12km long.
Where does the Spring Trail Series 12km take place?
The Spring Trail Series 12km takes place in South Down National Park, Midhurst, UK.
What is the elevation gain of the Spring Trail Series 12km?
The Spring Trail Series 12km elevation gain is 130 meters, which Runna classifies as a Moderate race.
How can I prepare for the Spring Trail Series 12km?
The best way to train for the next race is to use a personalized 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 Spring Trail Series 12km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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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Sport:
Running
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Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Spring Trail Series 2026 or World Ultra Corporation 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 Spring Trail Series 2026 website.
