Centurion Autumn 100

Autumn 100 : event overview

The Autumn 100 is a 100 mile (approximately 161 km) continuous trail race held on 18 October 2025 from Goring & Streatley on the River Thames, Oxfordshire. The route is four out-and-back spurs of about 25 miles each, using sections of the Thames Path and the Ridgeway National Trails. Total elevation is about 5,000 ft (1,500 m). Course markings and national trail waymarkers are used. The course surface is approximately 20% road / 80% trail. The published cut-off is 28 hours. Entry fee is £215 and the race fields up to 250 starters. Entries open on 16 November 2024 and places are allocated first come, first served. There is no waiting list.

Course, support and rules

There are 16 fully stocked aid stations along the route. Stations on legs 2, 3 and 4 provide hot drinks; hot food is available at Goring. Drop bags can be accessed at miles 25, 50, 75 and 100 and must be under 30 litres. Pacers are permitted from mile 75 and must run the full final 25 miles; pacer handovers are only allowed at the race HQ in Goring. Crews are not permitted. A dedicated medical team is on duty and the event is run under a UK Athletics permit. Runners must meet a qualification standard: completion of at least a 50 mile race within 15 hours between 1 January 2020 and the race date. Mandatory kit must be carried at all times; missing required items carries a one hour time penalty. Visit the organization's website for the most recent information.

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