ATW Centurion 100KM Triathlon Box End

About this event

The ATW Centurion 100KM Triathlon at Box End Lakes offers trail runners a serious endurance challenge in the rolling Bedfordshire countryside. This single-distance ultra traces loops around the scenic lake system, mixing waterside paths with woodland trails and open farmland. The flat-to-gently-rolling terrain makes it a strategic choice for runners targeting their first 100K or chasing a personal best. While the distance demands respect and proper preparation, the multiple-loop format provides regular crew access points and mental checkpoints throughout the day. Box End's peaceful lakeside setting creates a supportive atmosphere where runners can settle into their rhythm while enjoying views across the water.