Centurion Running Hundred Hills 50km

About this event

The Hundred Hills 50km winds through the rolling Chiltern countryside, starting and finishing at historic Stonor Park, an 850-year-old estate near Henley-on-Thames. The route covers two 25-kilometre loops with 1,320 metres of climbing, passing through ancient woodland and picturesque villages on some of the region's finest trails. It's a proper challenge — the terrain demands respect, but the 9-hour cutoff gives runners room to find their rhythm. Five well-stocked aid stations and full medical support keep things safe and accessible. Stonor Park becomes a proper finish-line gathering spot where supporters can watch runners come in while enjoying coffee and street food. As Centurion Running's season opener in late March, it attracts both ambitious first-time ultra runners and experienced athletes looking for an early-season test.

Distances