Chiltern Challenge

JUL
19
2025
Read all about the Chiltern Challenge on 19 Jul 2025 in Princes Risborough.
UTMB 50K 50 kilometers 25 kilometers 10 kilometers

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About the race

The Humanity Direct Chiltern Challenge is a one-day ultra running event held in the scenic Chiltern Hills, starting and finishing at Princes Risborough School in the South East of England. Participants can choose from three distances: 10km, 25km, or 50km, with ascent gains ranging from 258 to 871 meters. The course follows well-marked circular routes using National Trails and footpaths, featuring multiple checkpoints with food and water for longer distances.

The event offers a supportive atmosphere with fully stocked aid stations, medical cover, free parking, transport from the train station, and refreshments at the finish. Entry fees support Humanity Direct, funding vital surgeries for children in developing countries. Visit the organization's website for the most recent information.

50 km
25 km
10 km

Events nearby

Looped events where runners choose how many laps to run on the day, with maps, aid stations every lap and distances from 5K to 50K across several venues.
A single-loop 50K trail race from Berkhamsted through The Ridgeway and Ashridge, with 800 m ascent, fully marked navigation and three on-route aid stations.
Autumn trail races at Wendover Woods offering Marathon, Half Marathon, 10k and Junior Run on hilly, multi-terrain loops with on-site facilities and a six hour cut off.
Night trail at Stonor Park with three marked routes of 7 km, 13 km and 17 km, timed results, one outpost on middle and long routes and no dogs allowed.
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