Centurion Chiltern Wonderland 50®
The CW50 is a 50 mile single loop around the beautiful Chiltern countryside. The route takes in 5600ft of climb and visits picturesque villages, bursting with history, featuring locations made famous by British Film & Television.
As with all Centurion events, runners will be fully supported by 5 well stocked aid stations, full medical support and a marked course. Race held under full UK Athletics Permit granted through the TRA (Permit Number Pending).
Vital Stats
- Distance: 50mi (81KMs)
- Elevation: 5600ft (1700m)
- Cut-off: 13 hours
- Entry Fee: £115
- Date: 19 Sep 2026 08:30
- Course Marked: YES
- Medical Support: YES
- No. of Starters: 250
- Avg Temp: 14°C (57.2°F)
- Avg Rainfall: .60mm (2 inches)
- Avg Humidity: 90%
- # of Aid Stations: 5
- Location: EU / UK / ENGLAND / SOUTH-EAST
- Terrain: 80% TRAIL, 20% ROAD
General Info
Entries for 2026 will open at 1000 on Saturday 11th October 2025. Places are open on a first come, first served basis. Entrants must meet the minimum qualification standard below in order to apply. There will be no waiting list for this event.
Entry fee is £115 or £117 for unattached runners.
Runners may also enter the event as part of the 50 mile Grand Slam. To take part in the Slam, runners can enter each event individually, or buy a Grand Slam ticket which gets you entry to all four 50 Mile Slam events. Information on the Grand Slam, and how to enter it can be found by clicking here.
Qualification Standard: In order to enter you must have completed a minimum of a marathon distance race within the cut off time of that event between 1st January 2021 and race day. As organisers, we reserve the right to refuse anybody entry who does not meet this standard. Unqualified runners may enter but will be contacted approximately 8 weeks prior to race to verify qualification plans - if they have not updated their online information by this time.
Cut Offs: Runners must finish the course within a 13 hour time limit. There are additional cut offs on route which can be found in the aid station table.
Start/ Finish Location: Registration, Race Start, Race Finish and Race HQ are at Goring Village Hall, High Street, Goring-on-Thames, Oxfordshire, RG8 9AG.
Route: The race route consists of a single 50 mile loop through the Chiltern Hills. Starting and finishing in the riverside village of Goring On Thames, It begins by heading down the 'hilliest' section of the Thames Path National Trail to Whitchurch, before joining the Chiltern Way to Mapledurham. From there it is a short 4 mile section through to Sonning Common, before runners get in to some of the best climbs, descents, valleys and villages that the Chilterns have to offer. Travelling first through Bix, runners then pay a visit to Stonor Deer Park and at Turville and climb steeply out of the village directly past Cobstone Windmill. It's on and down through rolling countryside from there to the Ibstone check point. Runners then continue on the Chiltern Way to the highest point on the course at Christmas Common (800ft), before a fast descent underneath Watlington Hi