Trail · Chilterns, England
Hundred Hills 50K
Two different 25 km loops through the Chilterns, starting and finishing at Stonor Park.
Distance50 km
Dates20 March 2027
Total ascent1,200 m
Finish cutoff9 hours
FormatContinuous
Information for2027 edition
Before you make plans
A marked course with five aid stations. Read the intermediate cutoffs and mandatory kit requirements before entering.
Follow the official link for the current entry process, course information, checkpoint deadlines and mandatory kit. Availability is not updated live on this page.
Official information checked 9 September 2026. Distances and ascent can change with course revisions.