Centurion Chiltern Wonderland 50

Chiltern Wonderland 50

The Chiltern Wonderland 50 is a single-loop 50 mile (81 km) race held on 19 September 2026 with start and finish at Goring-on-Thames, Oxfordshire. The route runs through the Chiltern Hills and follows sections of the Thames Path, the Chiltern Way and the Ridgeway, visiting villages and landmarks such as Mapledurham, Sonning Common, Bix, Stonor Deer Park, Turville and Cobstone Windmill. The course totals 5,600 ft (1,700 m) of ascent and descent, with the highest point at Christmas Common (800 ft). Terrain is approximately 80% trail and 20% road.

The race is fully marked and supported by five aid stations, which provide a range of food and drinks including vegetarian, vegan and gluten free options. Full race medical cover is provided and the event is held under a UK Athletics permit through the TRA. Runners must finish within a 13 hour overall cut off; additional cut offs apply at aid stations.

Entries open 11 October 2025 and close 31 August 2026. Entry fee is £115 for UKA discounted entries or £117 for unattached runners. Minimum age is 20 and entrants must meet the qualification standard of a completed marathon within the event cut off between 1 January 2021 and race day. Pacers and crews are not permitted. All finishers receive a finisher medal and podium and veteran category prizes are awarded. Mandatory kit must be carried at all times and missing items incur a one hour time penalty. Visit the organization's website for the most recent information.