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Grafham Water Visitor Centre, Marlow Park
The ATW Grafham Triathlon brings open-water racing to the scenic Grafham Water Visitor Centre in Cambridgeshire, offering a flat and friendly course ideal for both first-timers and seasoned athletes. Competitors can expect clean reservoir swimming, smooth roads, and supportive marshals throughout a venue that has hosted national championships and GB qualifier races. The event focuses on an enjoyable race experience at an accessible location with clear signage and efficient organisation.
Multiple formats are available, including Sprint and Standard triathlons, a Standard Aquabike for non-runners, and a Standard-distance relay. The swim follows laps in Grafham Water, the bike uses a largely flat out-and-back route through local villages, and the run loops across the iconic dam wall on generally flat paths. Finishers are rewarded with a custom-designed medal, free event photos and finish-line treats, while paid parking is available on site and optional pre-race camping or dorm-style accommodation can be arranged nearby.