Hamilton Island Triathlon
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Event overview
The Hamilton Island Triathlon takes place on Saturday 15 November 2025 on Hamilton Island in the Whitsundays, Great Barrier Reef. The event weekend includes the main triathlon on Saturday, a Junior Hamilton Island Triathlon on Saturday and the Hamilton Island Ocean Swim on Sunday. Online entries close Friday 7 November 2025 and places are limited. Race kit collection and compulsory registration occur on Friday 14 November at the Beach Pavilion. Overnight security is provided in the transition area.
Course, categories and rules
The sprint triathlon course comprises a 750 m swim in Catseye Bay, a 20 km bike (three-loop course around the southern part of the island including the airport runway) and a 5 km run (one loop incorporating two marina laps and resort sides). Wetsuits and stinger suits are permitted for the swim; the water temperature is given as approximately 23 degrees. Non-drafting on the bike course is enforced and officials will police this. Shortcuts and rule breaches may lead to disqualification.
Individual competitors must be at least 14 years old as at 15 November 2025; team competitors must be at least 12 years old as at that date. Age-group categories for men and women are 14-19, 20-29, 30-39, 40-49, 50-59, 60-69 and 70+. The junior programme covers multiple distances for swim, bike and run and is open to children aged 4-14 years. Refunds are available if cancellation is made in writing before 14 November 2025. Visit the organization's website for the most recent information.
