Centurion Autumn 100

Autumn 100 : Centurion Running (17 Oct 2026)

The Autumn 100 is a 100 mile (161 km) continuous trail race based in the twinned villages of Goring & Streatley on the River Thames. The route comprises four separate 25 mile out and back spurs that use sections of the Thames Path and the Ridgeway national trails. Total elevation is listed as 5000 ft (about 1500 m).

The event is run under a UK Athletics permit and is marked by national trail waymarkers plus Centurion reflective ribbons and arrows. There are 16 fully stocked aid stations, full medical support, and additional course markings. Runners must finish within a 28 hour time limit. Drop bags are available at miles 25, 50, 75 and 100 and must be under thirty litres. Crews are not permitted.

Entry opens 8 November 2025 and places are allocated on a first come, first served basis; qualifiers are checked six weeks before race day. The minimum qualifier to enter is a completed 50 mile race within 15 hours between 1 January 2021 and race day. Pacers are allowed only from mile 75 for the final 25 mile leg and must cover the whole leg. Random kit checks will be made and specific mandatory items are required, including a charged mobile phone, water capacity of at least 1 litre, survival blanket, waterproof jacket, whistle, primary and backup lights of minimum 100 lumens, warm hat, gloves, a dry long sleeve top and a cup. Visit the organization's website for the most recent information.