Lake Argyle Swim

John Forrest, the explorer who first surveyed the rugged Kimberley region, once described this landscape as a place where the earth seems to have been scorched by ancient suns. For today's swimmer, that same intensity is reflected in the deep, turquoise expanse of Lake Argyle, a massive reservoir that has transformed the arid outback into a freshwater sanctuary. When you slip into the water, the silence is immediate; the only sound is the rhythmic stroke against the surface, surrounded by red cliffs that stand as silent sentinels over a course that pushes far beyond typical endurance limits.

Race day on the reservoir

The event, organized by Lake Argyle Swim Inc, is a marathon undertaking that demands both precision and resilience. Athletes choose between the 10km and 20km distances, both of which utilize a mandatory escort fleet of kayaks and support boats. This logistics-heavy requirement is not merely for safety; it is a necessity dictated by the sheer scale of the lake and its remote location. The 10km course begins at the 10km marker, guiding participants past the prominent Grit’s Peak and the navigationally significant 'The Heads'. For those tackling the 20km, the journey begins in the northern reaches, winding through Bamboo Cove and past Hagan Island before navigating the narrow stretch of Hicks Passage.

Because the lake is a complex, man-made environment, the water is generally calm, but the vast surface area can generate unexpected chop if the Kimberley winds pick up. You will encounter the local population of freshwater crocodiles; they are small, timid creatures, and organizers provide constant monitoring to ensure they remain at a respectful distance. The water temperature in May is typically mild, allowing for long-duration efforts without the thermal stress found in southern oceans. The course is marked by distinct buoy systems—yellow for the 10km, and a combination of red and green for the longer distance—ensuring that even in the vast open water, navigation remains consistent. It is a rare experience to swim through an environment where the infrastructure of a modern dam seamlessly blends into a prehistoric, rugged wilderness.