Centurion Hundred Hills 50km

MAR
20
2027
A 50 km trail ultra over two 25 km loops around the Chilterns from Stonor Park, with 4000 ft climb, five aid stations, mandatory kit and a 9 hour cut off.
Sat 20 Mar 2027
ITRA 2 50 kilometers

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Hundred Hills 50km

The Hundred Hills 50km is a trail ultra held in the Chiltern countryside, run over two different 25 km loops that start and finish at Stonor Park, Henley-On-Thames. The advertised distance is 50 km (31 miles) with approximately 4000 ft (1200 m) of ascent. The route is mostly trail (about 80%) with some road sections (about 20%) and passes through villages and ancient woodland.

The event is organised with a 9 hour overall cut off and course markings and is supported by five aid stations. Aid station supplies include drinks, gels, snacks, sandwiches and hot food at the finish; full medical support is provided with a static finish-line team and roving medics on course. The race is managed under a UK Athletics permit and will use a two-wave start; only runners placed in wave one are eligible for overall male and female awards. Medals are presented to all finishers and additional prizes are awarded for first to third male and female and for age category winners.

Race rules note that pacers and crew are not permitted. Mandatory kit must be carried and will be checked; examples include a fully charged mobile phone, minimum 1 litre fluid capacity, a survival blanket, a waterproof jacket and a whistle. Parking, registration and race HQ are at Stonor Park. Visit the organization's website for the most recent information.

Events nearby

Night trail at Stonor Park with three marked routes of 7 km, 13 km and 17 km, timed results, one outpost on middle and long routes and no dogs allowed.
Trail races of 7 km, 13 km, and 22 km through Stonor Park and the Chilterns, with steep sections, marked courses, and outpost support.
Trail event in Windsor on 8 November 2026 with chip timed 10K and half marathon from Alexandra Gardens, featuring medals, free photos and an event village.
A three day, 84 mile ultra along the Ridgeway from Buckinghamshire to Wiltshire with overnight stops, accommodation options and checkpoint support.
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