South Australia gets you into genuine arid country faster than anywhere else in the country. Four hours north of Adelaide the towns thin out, the ranges begin, and by Marree the sealed road ends and a different kind of trip starts.
South Australia is about 985,000 square kilometres and the driest state in the driest inhabited continent. Almost the entire population lives in a crescent around Adelaide, which means the driving splits cleanly: comfortable day trips within two hours of the city, then long empty runs in every other direction.
North, the Princes and Horrocks highways carry you through the Clare Valley to Port Augusta in about four hours, and from there the Flinders Ranges begin. Wilpena Pound is 450 km from Adelaide, roughly five and a half hours, and it is the point where most people's first outback trip actually starts. West, the Eyre Highway runs to Ceduna and then the Nullarbor. East, the Coorong and the Limestone Coast run down to Mount Gambier, 440 km and about five hours away.
The state's defining feature for a driver is how quickly the support infrastructure falls away. On the Stuart Highway between Port Augusta and Coober Pedy — 540 km — there are a handful of roadhouses and very little else. North of Marree, on the Oodnadatta and Birdsville tracks, you are on unsealed desert roads where a puncture is expected rather than unlucky and where the correct answer to a breakdown is to stay with the vehicle. Those tracks are not four-wheel-drive-only in dry conditions, but they demand two spare tyres, extra fuel, ample water and a satellite messenger regardless of vehicle.
Clare, Melrose, Quorn and Hawker, then Ikara-Flinders Ranges National Park and Wilpena Pound. The sealed loop is straightforward; the unsealed tracks through Brachina and Bunyeroo gorges are the reason to be there and need care after rain.
Down the eastern side through Whyalla and Cowell to Port Lincoln, around Coffin Bay, then north-west up the exposed coast to Streaky Bay and Ceduna. Quiet roads, long service gaps, and consistently strong wind on the west-facing coast.
Vehicle ferry from Cape Jervis, about 45 minutes, booked ahead for summer. A good part of the island's road network is unsealed and the gravel is loose. Wildlife on the roads at dawn and dusk is a genuine hazard, not a caution.
The Coorong lagoon system, Meningie, Robe and the volcanic craters at Mount Gambier. Flat, easy driving with a persistent onshore wind. The Coorong's tracks off the highway are sandy and unsuitable for two-wheel drive.
Unsealed desert track beside the old Ghan railway alignment, past Lake Eyre South and William Creek. Winter only. Two spares, extra fuel, water for several days and a satellite messenger. Check the track condition with the state transport department before setting out.
Wilpena Pound is the centrepiece — a natural amphitheatre with walks ranging from an easy hour to the full-day climb to St Mary Peak. The gorge roads through Brachina and Bunyeroo are unsealed, scenic and passable in a two-wheel drive when dry. Fuel at Hawker or Wilpena; nothing in between.
At the western end of Kangaroo Island, with Remarkable Rocks and Admirals Arch as the best-known features. The park was heavily burnt in the 2019–20 fires and the vegetation is still regenerating; some tracks and facilities remain altered from older guidebook descriptions.
On the southern tip of the Eyre Peninsula. The sealed section reaches Point Avoid; everything beyond it is soft sand requiring high clearance, reduced tyre pressures and a permit. The bay side is sheltered and the ocean side rarely is.
A World Heritage-listed limestone cave system in the state's south-east, notable for its fossil record. Cave access is by guided tour on a set timetable; the above-ground walking trails are open independently. An easy stop on the Limestone Coast run.
| To | Distance | Driving time | Note |
|---|---|---|---|
| Clare | 135 km | 1 h 45 m | Easy first stop heading north |
| Cape Jervis | 105 km | 1 h 30 m | Allow an hour before ferry departure |
| Port Augusta | 310 km | 3 h 30 m | The junction for north or west |
| Wilpena Pound | 450 km | 5 h 30 m | Last fuel at Hawker |
| Port Lincoln | 650 km | 7 h 30 m | Long way round the top of the gulf |
| Mount Gambier | 440 km | 5 h | Faster inland than via the Coorong |
| Coober Pedy | 850 km | 9 h | Split it at Port Augusta or Glendambo |
| Marree | 690 km | 8 h | Start of the Oodnadatta and Birdsville tracks |
The Flinders Ranges are at their best in autumn and spring. April and May give you settled weather and comfortable walking temperatures; September to November adds wildflowers after a wet winter and is the most popular window. Midsummer in the ranges is genuinely dangerous for walking, with regular days above 40 °C and little shade on the exposed ridges.
The desert tracks are winter propositions. May to August is the window for the Oodnadatta and Birdsville tracks — cold nights, mild days and a much lower risk of being caught out by heat if the vehicle stops. Rain closes these tracks outright, sometimes for a week at a time, and driving a closed track carries a substantial fine as well as the obvious risk.
The Eyre Peninsula sits between the two patterns. Its eastern, gulf-facing side is sheltered and workable most of the year, while the west coast beyond Streaky Bay is exposed to the Southern Ocean and blows hard from June through September. March, April, October and November are the reliable months for a full loop, and they are also when the caravan traffic through Port Lincoln is lightest.
The coast runs on the southern pattern: March to April and October to December, avoiding both the January crowds and the winter wind. Kangaroo Island and the Limestone Coast are cold and wet from June to August, and the Kangaroo Island ferry is subject to weather cancellations in that period.
One further timing note applies to the far north. Lake Eyre, or Kati Thanda, only holds water after substantial rain in the Queensland channel country, and that inflow arrives months after the rain itself. It is not an annual event and cannot be planned for in advance; if it happens while you are in the region, the Oodnadatta Track is the road that gets you close to it.
South Australian parks are managed by the state environment department, and both park entry and camping are booked through its online system. Many parks are free to enter with camping charged per site; a handful, including Flinders Chase, charge vehicle entry. A multi-park pass exists and is worth checking if you are covering several. Check current fees with the South Australian park service before you travel.
Free and low-cost camping is widespread in the pastoral country north of Port Augusta, and station stays along the Flinders and the Oodnadatta Track are a practical way to break the distances. Facilities are minimal — usually a long drop and sometimes bore water that is not for drinking. Carry your own water on any inland leg.
For caravans, the sealed Flinders loop as far as Wilpena is fine and well used. The gorge roads inside the park are not: they are narrow, rocky and have creek crossings, and towing through them is a bad idea even when they are dry. The Oodnadatta and Birdsville tracks are off-limits to conventional vans in practical terms, and most insurers exclude unsealed roads entirely.
If the Flinders is your first arid-country trip, spend a night at Melrose on the way up. It sits at the foot of Mount Remarkable, it has trees and water and a proper pub, and it lets you arrive at Wilpena already adjusted to the distances rather than doing 450 kilometres and a first outback night in one go.