Centurion Autumn 100
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Autumn 100 (Centurion)
The Autumn 100 is a continuous trail race of 100 miles (161 km) based in the twinned villages of Goring and Streatley on the River Thames. The course is made of four 25 mile out and back spurs that use sections of both the Ridgeway and Thames Path national trails and converge at Goring and Streatley.
The route order is: Thames Path to Little Wittenham, Ridgeway to Swyncombe Farm, Ridgeway to Chain Hill, and Thames Path to Reading, returning to Goring for the finish. Reported total ascent is about 5000 ft. Terrain is roughly 80 percent trail and 20 percent road. The event has a 28 hour overall cutoff and additional cut offs at aid stations.
Logistics include 16 fully stocked aid stations offering a range of sports nutrition and hot drinks on later legs, medical support throughout the weekend, and course markings using national trail markers plus Centurion ribbons and arrows. Drop bags are permitted at miles 25, 50, 75 and 100 and must be under 30 litres. Pacers are allowed from mile 75 only and must run the final 25 miles with their runner. Crews are not permitted.
Entries open on 8 November 2025 on a first come first served basis. Qualification requires completion of a 50 mile race within 15 hours between 1 January 2021 and race day. Finishers receive Centurion buckles and prize awards are given by position and age group. Visit the organization's website for the most recent information.
