Chiltern 50 Challenge 2026

Ultra marathon run/walk

Date: 26 Sep 2026

Sign-up fee: £Reg options from £15 for 10km

This is a superb 50 km looped challenge in some of the Chilterns finest countryside, with historic trails, rolling hills, nature reserves, and fantastic views. 

What to expect

The route follows the Thames to Henley Bridge, then out into countryside on Shakespeare’s Way, Icknield Way, and Chiltern Way with rest stops enroute. The full 50km route, with over 900 metres of climb, is a loop starting and finishing at our basecamp at Henley Showground – with a halfway at Lewknor. If 25km is more your thing – you can do a loop from the basecamp. The Henley basecamp has Friday & Saturday evening camping options (+ showers). There is a celebration meal & bar on the Saturday evening after the tough day out on the trails!

Choose your challenge

Whether you’re going for the full 50km or a shorter option, there’s something for everyone:

• Full challenge (50 km)
• Half challenge
• 10km

Find out more about the challenge and sponsorship options available.