Centurion Chiltern Wonderland 50

Event overview

Chiltern Wonderland 50 is a single-loop 50 mile race held on 19 September 2026 with race headquarters at Goring Village Hall, Goring-on-Thames, Oxfordshire, RG8 9AG. The course distance is 50 mi (81 km) with a total of 5600 ft (1700 m) of climb and 5600 ft of descent. The route is approximately 80% trail and 20% road. The published entry fee is £115, with an alternative fee of £117 noted for unattached runners. The event has a minimum age of 20 and a stated field size of 250 starters.

Route, aid and medical support

The route is a single loop through the Chiltern Hills and passes villages and landmarks including Whitchurch, Mapledurham, Sonning Common, Bix, Stonor Deer Park, Turville (past Cobstone Windmill), Ibstone, Christmas Common (highest point at about 800 ft), Watlington Hill, the Ridgeway, Nuffield, Grim's Ditch and Blue Tin Farm Shop. The course is fully marked and a GPX/KML file and map are available for download. There are five aid stations offering a range of food and drink including vegetarian, vegan and gluten-free options, and hot food and drink at the finish. A dedicated race medical team will operate on course with static and roving cover; runners are advised that medics may take time to reach remote locations and to contact emergency services where appropriate.

Rules, cut-offs and kit

Runners must finish within a 13 hour overall time limit; additional on-course cut-offs apply. Pacers and crew are not permitted. Finish line bags may be deposited at registration; drop bags at other aid stations are not permitted. Mandatory kit must be carried at all times, and a one hour time penalty may be imposed for missing items. Qualification requires completion of at least a marathon within the stated qualifying window. Visit the organization's website for the most recent information.