Find 50k ultra runs near me in Oxfordshire for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Starting in Lewknor, this event presents a varied and scenic route steeped in history. Crossing England’s longest river at the halfway mark, the course finishes at the iconic Lattin Down basecamp.
Sticking to higher ground, you'll pass through a surprisingly isolated stretch of southern England and enjoy dramatic views before finishing with the full 100K at the awesome Avebury Standing Stones.
The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!