Scottish-Australian ultramarathon swimmer Andy Donaldson has delivered one of the most remarkable open-water performances of the year, completing a brutal 55km swim through Western Australia’s crocodile-inhabited Ord River in a record time of 11 hours and 51 minutes.
The 35-year-old endurance athlete took on the infamous “Dam to Dam Challenge,” a route stretching from Lake Argyle to Kununurra through the remote East Kimberley region, an environment as unforgiving as it is breathtaking.
And the challenge was clear from the very start. A 2.5-metre freshwater crocodile waiting near the launch ramp served as an immediate reminder of what Donaldson was up against. The Ord River is home to an estimated 5,500 freshwater crocodiles, roughly one every 10 meters along his route.
Despite the intimidating setting, Donaldson approached the swim with calculated confidence.
“It’s always a bit nerve-racking in open water where there’s wildlife,” he said. “But the perceived fear is often much bigger than the reality. Safety is always the priority, we don’t take unnecessary risks.”
A Race Against Nature
Starting in darkness at 5:38am, Donaldson built early momentum before facing the full force of the Kimberley environment. Temperatures climbed to 34°C, forcing his support crew to improvise shade while he battled fatigue and the unique challenges of freshwater swimming.
Without the natural buoyancy of saltwater, maintaining efficient body position became increasingly difficult as the hours wore on. “Your hips drop, and you feel like you’re dragging your legs more as you fatigue,” Donaldson explained.
Conditions didn’t let up. A surprise headwind and sections of “dead water”, where the river current disappears, added further resistance to an already punishing effort.
Yet Donaldson stayed composed, methodically working his way through the course with the support of a dedicated crew of paddlers, coaches, and river experts guiding him safely through the terrain.
Breaking Records and Barriers
Donaldson’s time smashed the previous benchmark of 16 hours and 13 minutes, set in 2024 by Simone Blaser, who was notably part of his support team during this attempt.
As he approached the finish, local swimmers joined him for the final 200 metres, creating a powerful moment of shared achievement.
“These kinds of challenges are never done alone,” Donaldson said. “Having the right people around you makes all the difference, not just in sport, but in life.”
A World-Class Resume
Already regarded as one of the world’s premier ultramarathon swimmers, Donaldson continues to redefine what’s possible in endurance sport.
In 2023, he became the first athlete to complete the legendary Oceans Seven challenge, seven of the toughest channel swims on the planet, within a single calendar year.
But even among his global achievements, this latest feat stands out. “I’ve swum in incredible places all over the world,” Donaldson said. “But this was the most beautiful and special swim I’ve ever experienced.”
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