Chiltern 50 Ultra Challenge 25 km
- When
- Sat, Sep 26, 2026, 12:00 AM
- Where
- Henley-on-Thames, GB
- Distances
- 10K · Marathon · Ultra Marathon
- Terrain
- TRAIL
- Price
- 15–375 GBP
- Elevation gain
- 920 m
- Typical weather
- Mild
- Organizer
- Action Challenge Ltd
About
The 10 km Loop on Saturday 26 September 2026 is a shorter circuit from Henley Showground through nearby Chilterns trails, a family-friendly, roughly 10 km route with ~235 m of elevation gain organised by Ultra Challenge / Action Challenge that lets participants enjoy the Henley basecamp atmosphere and scenic hills in a compact format.