Chiltern Challenge

Princes Risborough, United Kingdom • 19 Jul 2025

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.

Race information

50 km
25 km
10 km
Visit the organization's website for the most recent information.
Trail runs nearby

A mixed terrain half marathon, 10K and junior race take place along the Thames at Remenham Farm on 11 April 2026. The event features waymarked trails, chip timing and a race village with food and post race goodies.

Experience a guided marathon through the beautiful Chiltern Hills with expert navigation and support. Run iconic trails like the Ridgeway in a small group setting led by qualified leaders.

Join PHOENIX Fridays Run for a Tenner for a relaxed timed riverside run with flexible rock up and run starts supporting Rays of Sunshine. Choose distances from 5 km to ultra and earn a special medal on a flat towpath.

Experience a scenic looped challenge through Windsor Great Park and along the Thames Path. Choose to walk, jog, or run distances from 10 km to 50 km with full professional support and a celebration at Windsor Racecourse.

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