England, UK · 10K · 30K · 50K Ultra
Winter X
Winter X is a 10K, 30K, 50K Ultra and 70K Ultra event held in Southampton, England, UK. Its next confirmed date is Monday, December 28, 2026. About 300 runners take part across all distances.
- Race day
- December 28, 2026
- Location
- Southampton, England
- Field size
- ~300 runners
Race details
- Date
- Monday, December 28, 2026
- Location
- Southampton, England, UK
- Distances
- 10K, 30K, 50K Ultra, 70K Ultra
- Field size
- About 300 runners
- Course
- 3068 ft gain
- Registration
- sientries.co.uk
- Official website
- chalk-and-mud-trail-running.co.uk
Registration, course & weather
- Registration status
- Registration status as last checked October 17, 2026: not announced
- Start time
- 8:00 AM
- Course profile — 70K
- Loop course; Road surface; 3068 ft gain (estimated from third-party elevation data)
- Course profile — 50K
- Loop course; Road surface; 2730 ft gain (estimated from third-party elevation data)
- Course profile — 30K
- Loop course; Road surface; 1637 ft gain (estimated from third-party elevation data)
- Course profile — 10K
- Loop course; Road surface; 253 ft gain (estimated from third-party elevation data)
About the Winter X
Winter X in Southampton.
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Winter X: common questions
- When is the Winter X?
- The next confirmed date is Monday, December 28, 2026.
- Where is the Winter X held?
- In Southampton, England, UK.
- What distances does the Winter X offer?
- 10K, 30K, 50K Ultra and 70K Ultra.
- How many people run the Winter X?
- About 300 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Winter X?
- Registration is handled by the organiser at sientries.co.uk. Entry fees, caps and deadlines are set there.
- Is registration open for the Winter X?
- Registration status as last checked October 17, 2026: not announced.
- What time does the Winter X start?
- 8:00 AM.
Plan this race in RaceRove
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