Chiltern Ridge Winter 50K

Berkhamsted, United Kingdom • 1 Nov 2025

The Chiltern Ridge Winter 50K is an autumn/winter trail ultra marathon held in the Chilterns, starting and finishing at Berkhamsted Cricket Club. The 50-kilometer looped course features undulating terrain with over 800 meters of elevation, passing through scenic woodland trails, Berkhamsted Common, National Trust's Ashridge Estate, and along The Ridgeway National Trail to Aldbury and Wendover. Runners then follow the Chiltern Way on single-track paths back to Berkhamsted. The race is fully marked with arrows and ribbons, supported by marshals, and includes three aid stations offering hydration, nutrition, and toilets. The event is limited to 250 runners aged 20+, with a 9-hour time limit, and is part of the UTMB World Series. Visit the organization's website for the most recent information.

Race information

50 km
800 m+
50k Ultra
Visit the organization's website for the most recent information.
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