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Chiltern Hills 100K

Chesham, United Kingdom • 9 May 2026

The Chiltern Hills 100K is a 100-kilometer ultra marathon held in the Chiltern Hills, Buckinghamshire, UK. The race features an anticlockwise loop starting and finishing in Chesham, passing iconic landmarks such as Ashridge Estate, Coombe Hill, Whiteleaf Hill, Bledlow Ridge, and Great Hampden. With over 1800 meters of elevation gain, the course follows well-marked trails including sections of The Ridgeway National Trail. The event supports up to 250 runners aged 20 and above, offering GPS tracking, multiple aid stations stocked with hydration and nutrition, and a post-race meal. It is TRA licensed, part of the UTMB World Series, and emphasizes safety with required mandatory gear. Visit the organization's website for the most recent information.

United Kingdom South East (England) Chesham

Race information

Website
UTMB 100K
100 km
1800 m+
100k Ultra
Visit the organization's website for the most recent information.
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