There is a short season each year when the Leeuwin-Naturaliste coast is exactly as it should be. The heat of summer has gone, the winter swell has settled, and the low scrub that runs along the clifftops between Cape Naturaliste and Cape Leeuwin flushes with flower. Locals know it as the walking window. For a handful of weeks from September into early November, the Cape to Cape Track is at its considered best, and it sits close enough to Busselton that you can taste it a section at a time.

The Cape to Cape is Western Australia's great southern coastal walk. It threads 123 kilometres of limestone headland, karri and peppermint woodland, granite outcrop and long empty beach, joining the lighthouse at Cape Naturaliste in the north to the lighthouse at Cape Leeuwin at Augusta in the south. You can walk the whole thing over five to seven days, or you can do what most visitors sensibly do and pick off the finest sections one day at a time, returning each evening to a warm room and a proper dinner. From a beachfront base on Geographe Bay, the northern trailhead is barely half an hour up the road.

This guide is built for the second approach. It explains why spring is the moment, walks you through the sections worth prioritising, points out what is flowering underfoot and swimming offshore, and sets out how to plan a day so the walking is a pleasure rather than a slog. Treat it as a starting map, not a rulebook, and let the season do the rest.

Spring on the two capes rewards the unhurried. Walk less, look more, and let the coast come to you.

Chapter 01 · The SeasonWhy Spring Is the Window

Every part of the year offers the Cape to Cape something. Summer brings warm swimming and long light. Winter brings dramatic seas and the year's heaviest wildflower rains. But spring gathers the best of it into one narrow window, and it is the season a good walker plans around.

The first reason is temperature. From September the days settle into the high teens and low twenties, warm enough for shirtsleeves on a sheltered headland and cool enough that a full section walk never turns punishing. The soft-sand stretches that feel endless in January are simply pleasant now. The second reason is colour, and it is the one that draws people from across the state. The coastal heath and the woodland behind it bloom in a sequence that runs for weeks, so that the same path walked a fortnight apart shows an entirely different palette.

The third reason is offshore. Spring is the tail of the whale season on this coast, and humpbacks with their calves, along with the occasional southern right, move north and then south through the deep water off Cape Naturaliste. From the clifftops you often see them without a boat at all. If you would rather get close, the same window is the peak of the whale watching that runs out of Geographe Bay, and a cruise pairs naturally with a morning on the track.

Finally there is space. The Margaret River region fills over summer and the school holidays, but the shoulder weeks of spring are quieter on the paths and easier on the roads. You will share the popular lookouts, but the long middle of most sections is often yours alone. That is a large part of the appeal, and it is worth building a trip around while the window is open.

Chapter 02 · The TrackThe Sections Worth Prioritising

The northern half of the Cape to Cape is the most accessible from Busselton, and it happens to hold some of the track's most photographed country. Each of the sections below runs between road access points, so you can walk it one way and arrange a car at each end, or turn back at a natural halfway mark. Distances are approximate and the drive times are measured from Abbey Beach Resort, so you can judge what fits a morning.

Chapter 03 · UnderfootWhat Is Flowering, and Where to Look

The wildflowers are the reason many walkers wait for spring, and Western Australia's south west is one of the richest flowering regions on earth. You do not need to be a botanist to enjoy it. You only need to slow down, look low, and notice how the colour changes as the path moves from open heath to woodland and back to the coast.

On the exposed clifftops between the capes, expect the low, wind-pruned heath to carry a scatter of pea flowers, coastal daisies and the occasional flash of a running postman. Step back from the coast into the banksia and peppermint woodland and the display deepens: banksia cones heavy with nectar, the last of the season's orchids in the leaf litter, and drifts of everlastings where the soil suits them. Granite country, like the ground around Sugarloaf Rock, holds its own small specialists that cling to the shallow soil in the cracks.

Two rules make the flowering better for everyone. Stay on the marked track, because the heath is fragile and a boot off the path does lasting damage to the very thing you came to see. And leave it where it grows: picking is not only unkind to the next walker, it is illegal in the national park. A photograph carries home just as well and asks nothing of the plant. If the flowers hook you, the same instinct for the region's quieter corners runs through our local guide to nature in the South West.

Chapter 04 · The DetoursWhere the Track Meets the Rest of the Region

Part of what makes a Cape to Cape trip so easy to love is that the track never runs far from the region's other pleasures. A morning on the coast leaves the afternoon open, and the sights sit conveniently along the same ridge of limestone the path follows.

That ridge is riddled with caves. The same soft rock that gives the coast its cliffs has been hollowed underground into the show caves of the Margaret River region, and a cool hour below ground is a fine counterpoint to a windy clifftop. If you have a spare afternoon, our guide to the region's limestone caves sets out which ones to choose and when.

Closer to Busselton, the walking is gentler still. The Ludlow Tuart Forest, one of the last tall tuart woodlands in the world, offers flat, shaded trails a short drive from the resort and is a good option on a day when the exposed capes feel like too much. And when the legs have had enough of paths altogether, the farm gates and cellar doors along the South West food trail reward a slow drive home more than any pedometer ever will.

If you would rather anchor the whole visit closer to town, the pace works there too. Busselton itself carries enough to fill the gaps between walks, and a slower two-day Busselton itinerary shows how little ground you actually need to cover to feel you have seen the place. The point of a spring trip is not to tick off kilometres. It is to be outside while the outside is at its best.

Chapter 05 · The PracticalitiesHow to Do It Properly

The Cape to Cape is well loved and well marked, but it is real coast, and a little planning turns a good day into an easy one. None of this is complicated. It is simply the difference between finishing a section glad you came and finishing it wishing you had thought ahead.

Pack for Wind and Sun

The capes are exposed, and the same clear spring day that feels mild in the car can bite on an open headland. Carry a windproof layer, a hat and sunscreen regardless of the forecast, and take more water than you think you need, because there is none reliably available on the track. Sturdy shoes with grip earn their place on the loose limestone and soft sand.

Watch the Tide and the Time

Several sections cross beach that is far more pleasant, and in a few places only passable, around low tide. Check the tide before you commit to a beach stretch, and start early so you are not racing the light on the return. Mornings are also the calmest part of a spring day, which makes for better walking and better whale spotting.

Sort the Transport

Because the finest sections are one-way, the simplest plan is two cars, one left at each end, or a local trail-transport service that will shuttle you back to your start. Failing that, choose an out-and-back from a single access point and turn around at a landmark. Whatever you decide, tell someone your route and your expected return, and carry a charged phone.

Walk Within Yourself

Grade the distance to the least fit person in your group, not the most. The track will still be here tomorrow, and a shorter section walked well beats a long one endured. If you are returning to walking after a break or managing any health concern, build up gently and see your doctor before a demanding day out. The coast rewards patience far more than it rewards ambition.

With self-contained Busselton accommodation waiting a short drive from the trailheads, all of this gets easier. Come back from a section to a hot shower, an indoor pool and a sauna for the legs, and a kitchen if you would rather cook, or a meal at one of the on-site restaurants if you would not. The next morning you choose another section, or a cave, or a cellar door, and start again. There is a reason people who discover the two capes in spring tend to come back the following year, and often the same week.

If a longer stay is on the cards, it is worth glancing at the current deals and packages before you book, and at the wider list of local attractions around Busselton for the days you decide to leave the boots by the door. The track is the anchor of a spring trip, but it was never meant to be the whole of it.