Centurion Autumn 100
Goring, United Kingdom • 17 Oct 2026
Overview
The Autumn 100 is a 100 mile continuous trail race. It is held in the villages of Goring and Streatley on the River Thames. The route consists of four different 25 mile out-and-back spurs using sections of the Ridgeway and Thames Path National Trails.
Route
The course begins from Goring. The first spur goes to Little Wittenham along the Thames Path and returns. The second, more challenging spur goes out to Swyncombe Farm on the Ridgeway and returns to Goring. The third spur goes west on the Ridgeway to Chain Hill and returns. The final leg goes on the Thames Path to Reading and returns for the finish.
The route can be flat and fast in dry conditions. Runners face up to 13 hours of darkness and the potential for low temperatures, wet, and windy autumn weather.
Event Details
The event is organized by Centurion Running. It is described as the fastest trail 100-mile race in the UK. There are 16 aid stations, full medical support, and course markings in addition to the National Trail waymarkers. The race is held under a full UK Athletics permit.
Participation
The minimum age for entry is 20. Entry fees apply. Entries open on Saturday, November 8, 2025. Visit the organization's website for the most recent information.