Three Castles 50km Race

Join the Three Castles 50km Ultra Marathon, one of the UK’s premier trail running events set along the stunning River Medway on June 5th, 2027.
This scenic journey begins beneath Rochester Castle's imposing walls and winds through picturesque villages and tranquil riverside paths. As you make your way westward across Kent’s beautiful landscapes, three iconic medieval castles punctuate your route with historical charm. The flat terrain makes it one of the most accessible ultra marathons in the UK for both first-time runners and seasoned athletes looking to set a new personal best.
Four fully stocked aid stations along the course provide everything you need, from water and snacks to Tailwind Nutrition and fresh fruit, ensuring that your race day experience is as smooth as possible. Live GPS tracking keeps friends and family updated on your progress throughout the 50km journey.
The finish line awaits at Tonbridge School Centre where runners will complete a celebratory lap of the athletics track before crossing under cheering crowds in an unforgettable atmosphere. With generous volunteer support, medical assistance available along the route, and a strict nine-hour cut-off to ensure safety, every detail is meticulously planned for your comfort and success.
Registration takes place early on race day at King’s School Cricket Ground with a mandatory briefing before runners are bused to the start line in Rochester. Waves of starters will be allocated based on estimated finish times, allowing faster runners to lead off followed by subsequent waves every 15 minutes thereafter.
Whether you're an ultra marathon veteran or tackling your first long-distance event, Three Castles offers unparalleled scenery and a community spirit that keeps participants coming back year after year for this unique point-to-point adventure.