Centurion Hundred Hills 50km

Event overview

The Hundred Hills 50km is scheduled for 14 March 2026 at Stonor Park, Henley-on-Thames (RG9 6HF). The race distance is 50 km (31 mi) and is run as two different 25 km loops. The minimum age for entry is 20 or older. Entries opened 5 April 2025 and close 14 February 2026. The entry fee is £78 for affiliated runners and £80 for unaffiliated runners. Entries so far are listed as 322 participants. There is no waiting list.

Course, services and rules

The route travels through the Chiltern countryside, passing villages and ancient woodland. Total ascent is listed as 4000 ft (about 1200 m). Terrain is given as 80% trail and 20% road. The race has a 9 hour overall cut off and the course will be marked for the full route. Five aid stations are provided with hot food and a range of drinks and snacks. Medical support is provided with a static finish team and at least one roving team on course. There will be kit checks and a one hour time penalty for any mandatory item found missing. Mandatory items include a charged mobile phone, at least 1 litre water capacity, survival blanket, waterproof jacket with sealed seams, whistle, and a long sleeved top kept dry for emergency use. Pacers and crew are not permitted. Parking is at the start and finish; finish line bag drop is available for runners without vehicles. Medals are given to finishers and prizes are awarded for overall places and age categories. Visit the organization's website for the most recent information.