The Dingo Fence: One of the Longest Structures on Earth
Somewhere along the route between Marree and Coober Pedy, our tours cross a section of fencing that doesn’t look particularly remarkable at first glance — a wire fence, similar to countless others across rural Australia. What makes it remarkable is its scale, and the reason it exists in the first place.
How Long Is It Actually?
The Dingo Fence, also known as the Dog Fence, stretches for approximately 5,614 kilometres across Queensland, New South Wales, and South Australia. That makes it one of the longest continuous structures built by humans anywhere on Earth — longer than the distance from Perth to Cairns.
It’s not a single continuous fence built at one time by one authority. It’s a patchwork of fences built and maintained by different state and regional authorities over more than a century, gradually connected and extended into the network that exists today.
Why It Was Built
The fence exists to separate dingo-populated northern and central Australia from the more intensively farmed sheep grazing land to the south. Dingoes prey on sheep, and in the era before the fence, losses to dingo predation were a serious economic problem for pastoralists in fence-adjacent regions.
Construction of various sections began in the early twentieth century, largely driven by state governments responding to pressure from the pastoral industry. Over decades, disconnected regional fences were extended and linked, creating the vast network that exists today.
How It’s Maintained
Maintaining a fence of this length across genuinely remote country is a significant ongoing task. Boundary riders — workers responsible for patrolling and repairing sections of the fence — cover vast distances checking for damage from weather, wildlife, or erosion. In some sections, this work is done by vehicle; in the most remote stretches, historically it was done on horseback or camel, and some maintenance still requires off-road vehicles capable of covering genuinely difficult terrain.
Does It Actually Work?
The fence’s effectiveness has been debated by ecologists for decades. Research comparing dingo populations and ecological outcomes on either side of the fence has produced genuinely interesting findings about how the presence or absence of a top predator affects everything from kangaroo populations to vegetation cover. It’s a live area of ecological research, and the fence itself has become an unplanned large-scale natural experiment in predator ecology.
What You’ll See Crossing It
From the vehicle, the fence itself looks unremarkable — a wire fence stretching to the horizon in both directions, sometimes with a gate where the road crosses. What makes the moment worth pausing for is the scale you’re crossing through: a single structure that runs for thousands of kilometres, built gradually by generations of pastoralists solving a problem that mattered enormously to their livelihoods.
We point it out when we cross it on tour — it’s one of those details that’s easy to drive past without noticing, but genuinely interesting once you know what you’re looking at.
