Centurion Autumn 100 is a 100 miles ultra marathon in Goring-on-Thames, United Kingdom. Distance: 161km. Elevation: 3,000m D+. Difficulty: challenging (Challenge Rating 39/100). DNF rate: 25%. Time limit: 30h. Surface: trail. Established 2012.
Centurion Autumn 100
Goring-on-Thames, Oxfordshire, United Kingdom
"100 miles along Britain's oldest road — a fast, runnable course through English chalk downland and river paths."
A runnable 100-miler on the Ridgeway and Thames Path — Britain's oldest road through the English countryside with excellent support.
The Course
Following the Thames Path and Ridgeway from Goring to the coast. A relatively fast, runnable 100-miler through the English countryside — chalk downland, river paths, woodlands, and gentle hills. Less mountain, more endurance.
hilly
point-to-point
15
260m
Runner Experience
Solid aid station network with 15 stops along the course. Standard ultra fare — food, electrolytes, first aid.
Warm, inclusive finish line with a strong community feel. Runners celebrate together regardless of finish time.
Race Day Weather
10°C
5° – 15°
80%
50%
English autumn. Cool, often wet. Muddy trails. Short daylight hours means significant running in darkness.
Stats & Records
2012
200
25:00:00
13:48:22
Craig Holgate (2023)
16:35:45
Beth Pascall (2022)
Entry
£160
February
weeks
Lore & Trivia
Centurion Running's Autumn 100 follows the Thames Path and Ridgeway National Trail through the chalk downlands of southern England. The 100-mile course is one of the most runnable hundreds in the UK — largely flat or gently rolling terrain on well-maintained paths. This makes it both an excellent first 100-miler and a fast course for experienced runners chasing times. The October timing means autumn colours along the Thames, misty dawns over the Berkshire Downs, and the particular English beauty of running through a landscape that has been walked for millennia.
- ▸ 100 miles along the Thames Path and Ridgeway National Trail.
- ▸ One of the flattest 100-milers in the UK — a fast course.
- ▸ Part of Centurion Running's four-race 100-mile series.
- ▸ October timing means autumn colours and misty English mornings.
- ▸ Popular first 100-miler due to the runnable terrain.
- ▸ The Ridgeway is Britain's oldest road — 5,000+ years old.
- ▸ Centurion Running is the UK's most respected ultra race series.
The Autumn 100 is honest. The course is fast, the organisation is flawless, and the only thing stopping you is yourself.
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Frequently Asked Questions
How long is Centurion Autumn 100? +
Centurion Autumn 100 is a 100 miles (161km) ultra marathon with 3,000m of elevation gain. The course is point-to-point on trail terrain.
How hard is Centurion Autumn 100? +
Centurion Autumn 100 is rated challenging with a Challenge Rating of 39/100 (Moderate). The DNF rate is 25%. Runners have 30 hours to finish.
What is the weather like at Centurion Autumn 100? +
Average temperature is 10°C (range 5°C to 15°C) with 80% humidity and a 50% chance of rain. English autumn. Cool, often wet. Muddy trails. Short daylight hours means significant running in darkness.
Are crew and pacers allowed at Centurion Autumn 100? +
Crew access is allowed. Pacers are allowed after 80km.
What is the course record for Centurion Autumn 100? +
The men's course record is 13:48:22 set by Craig Holgate in 2023. The women's course record is 16:35:45 set by Beth Pascall in 2022.
What is the average finish time for Centurion Autumn 100? +
The average finish time is 25:00:00. About 200 runners finish each year. The DNF rate is 25%.
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