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Berkhamsted Cricket Club, Berkhamsted, Hertfordshire, United Kingdom
The Chiltern Ridge Winter 50K is the autumn/winter edition of Runaway Racing's Chiltern Ridge ultra and follows a scenic single-loop 50K route. The course starts and finishes at Berkhamsted Cricket Club and passes through Berkhamsted Common, the National Trust's Ashridge Estate and long sections of The Ridgeway and the Chiltern Way. The event is waymarked with marshals at busy or road crossing points and includes course-wide medical support to help ensure participant safety. It is organised as a limited-field trail ultra with a published overall time limit and mandatory navigation backup requirements.
Runners receive a finishers medal and live chip timing with on-course splits, and there are three stocked on-route aid stations plus free on-route photography. The route is predominantly single-track and woodland trail with undulating, hilly terrain and around 800m of ascent. Entry details, mandatory kit and the full athlete guide (including GPX) are published by the organiser on the event page and registration opens in advance with a capped field. The event is promoted and run by Runaway Racing and is licensed by the Trail Running Association under UK Athletics rules.