The MTC Thames Challenge
Kemble, United Kingdom • 7-10 Aug 2025
The MTC Thames Challenge is a four-day ultra marathon spanning 184 miles along England’s longest river, from the Thames source in the Cotswolds to the Thames Barrier in Greenwich. Participants complete four stages: the Cotswold Ultra, Oxford Ultra, Windsor Ultra, and Richmond Ultra, each offering unique scenic routes. Finishers receive bespoke medals, T-shirts, mugs, or hats, with top male and female athletes earning trophies. The event includes accommodation, meals, and logistical support, and offers the chance to earn the “Severn & Thames Buckle” by completing both the Thames and Severn Challenges in the same year. It is a demanding race suitable for experienced ultra runners. Visit the organization's website for the most recent information.