Centurion Hundred Hills 50km
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Hundred Hills 50km : Centurion Running (Stonor Park, 14 March 2026)
The Hundred Hills is a 50 km trail ultra through the Chiltern countryside, organised as two different 25 km loops that start and finish at Stonor Park, Henley-On-Thames (RG9 6HF). The route includes approximately 4000 ft (1200 m) of ascent and runs mostly on trails with some road sections; terrain is listed as about 80% trail and 20% road. The course is marked with Centurion ribbons and marker arrows, and the event features five staffed aid stations, full medical support including roving teams and a static first aid team at the finish.
A nine hour overall time limit applies, with additional intermediate cut-offs at aid stations. No pacers or crew access are permitted on course. Mandatory equipment must be carried at all times and includes a fully charged mobile phone, at least 1 litre of water capacity, a survival blanket, a waterproof jacket with sealed seams, a whistle, and a long-sleeved base layer or fleece kept dry for emergency use; a one hour time penalty may be applied for missing mandatory items. Finishers receive a medal with an option to exchange it for a tree planting or a patch; age-category and overall prizes are awarded. At the time of listing the organiser operated a waiting list for new entries. Visit the organization's website for the most recent information.
