Killiecrankie to Old Man’s Head & Stacky’s Bight
- August 24, 2026
A demanding loop over Mount Killiecrankie to the remote Stacky's Bight and Old Man's Head rock formation.
The Castle Rock Walk is one of the best coastal walks on Flinders Island, following the beautiful shoreline of Marshall Bay from near Allports Beach to a remarkable granite boulder known as Castle Rock. The route combines white sandy beaches, rocky headlands, coastal vegetation and wonderful views across the waters surrounding the Furneaux Group. Castle Rock itself is the unmistakable highlight – an enormous, weathered granite boulder sitting beside the shoreline and towering over walkers who reach its base. The walk is recognised as one of Tasmania’s 60 Great Short Walks and is an excellent choice for visitors looking for a scenic coastal outing without the strenuous climbing of nearby Mount Strzelecki.
| Location | Marshall Bay, Flinders Island, Tasmania |
| Distance | Approximately 6.6 km return |
| Time | Approximately 1.5–3 hours return – allow longer for a relaxed walk |
| Difficulty | Medium – Grade 3 |
| Track Type | Return coastal walk |
| Track Surface | Beach sand, coastal track and rocky headlands |
| Start | Castle Rock track and car park near Allports Beach |
| Best Time | Low or falling tide and settled weather |
| Suitable for Children | Yes – active children with supervision |
| Facilities | Toilets, picnic facilities, BBQs and tank water available at nearby Allports Beach |
The Castle Rock Walk follows the coast of Marshall Bay, passing a succession of attractive beaches, granite outcrops and low coastal vegetation before reaching the huge granite formation that gives the walk its name. Much of the route follows beautiful white-sand beaches. In places the track moves inland to bypass rocky headlands before returning to the shoreline. The relatively gentle terrain makes this a very different experience from the steep mountain walking found in southern Flinders Island. Instead, Castle Rock is all about taking your time and enjoying the beaches, geology and expansive coastal scenery.
The walk is predominantly beach and coastal walking, with sandy sections interspersed with rocky headlands and short sections through coastal vegetation. There are no major climbs, but walking on soft sand can make the route more tiring than the distance might suggest. Rocky sections also require a little care, particularly when surfaces are wet. Tide and sea conditions can influence the walk considerably, so it is worth checking conditions before leaving.
The current Tasmania Parks and Wildlife Service listing rates Castle Rock as a Grade 3 walk. The route is approximately 6.6 kilometres return and does not involve any significant climbing. The main challenges are walking on sand, negotiating occasional rocky sections and choosing suitable tide and weather conditions. Most reasonably active walkers should find Castle Rock manageable, but allow extra time if you plan to stop for photographs, explore the beaches or have lunch near the rock.
The obvious highlight is Castle Rock itself. This enormous granite boulder sits beside the shoreline at Marshall Bay and dwarfs walkers standing near its base. Its rounded, weathered shape is characteristic of the spectacular granite formations found throughout Flinders Island and provides an impressive destination at the end of the outward walk.
The route follows the shoreline of Marshall Bay, providing almost continuous coastal scenery. White beaches, clear water, rocky headlands and offshore views make this an especially attractive walk in fine weather.
The coastline contains fascinating granite and granodiorite formations. Some of the rocks exposed around Allports Beach formed from molten magma deep beneath the Earth’s crust hundreds of millions of years ago before eventually being exposed by uplift and erosion.
Another attraction is simply the opportunity to walk along some of Flinders Island’s wonderfully uncrowded beaches. Depending on the time of year, you may have long sections of coastline almost entirely to yourself.
Top Tip: Try to walk Castle Rock around a low or falling tide. This generally provides easier beach walking and reduces the likelihood of having to negotiate waves around rocky sections.
Castle Rock can be walked throughout the year in suitable conditions, but tide and weather are more important than the season. A calm day with a low or falling tide provides the most enjoyable conditions. Strong winds and large seas can make the exposed coastline considerably less pleasant. Sunset can be particularly beautiful around Castle Rock, although walkers planning a late visit should make sure they have sufficient daylight to safely return to the trailhead.
Yes, for active children with supervision. There are no major climbs, and the combination of beaches and the enormous Castle Rock makes this an interesting walk for families. The 6.6-kilometre return distance may be tiring for younger children, particularly because much of the route involves walking on sand. Children should also be closely supervised around the water and rocky shoreline.
Dog access should be confirmed locally before setting out. Visitor information for Castle Rock currently lists the attraction as pet friendly subject to enquiry, so visitors travelling with a dog should check the latest access conditions before walking.
The Castle Rock Walk begins near Allports Beach on the western side of Flinders Island. From Whitemark, travel north towards Palana on the B85. Approximately 17 kilometres north of Whitemark, turn left towards Allports Beach. Continue for approximately 2 kilometres and look for the sign marking the Castle Rock track and car park. An alternative approach is available from the Marshall Bay end via the Marshall Bay Access Track, which can also make a one-way walk possible if you arrange a vehicle shuttle.
There are limited facilities along the walk itself, but a useful range of visitor facilities is available at nearby Allports Beach.
As with any remote island walk, it is sensible to carry your own drinking water rather than relying entirely on tank water.
It is worth allowing extra time to explore Allports Beach before or after the walk. The sheltered white-sand beach is an attraction in its own right and provides a beautiful place for a picnic or swim when conditions are suitable. The picnic area also makes Allports Beach a convenient place to relax after completing the Castle Rock walk.
If you have time, it is worth doing both. The nearby Trousers Point Coastal Walk is shorter at around 2 kilometres and provides spectacular views of the Strzelecki mountains, granite boulders and turquoise water. Castle Rock is the longer outing and has more of a traditional beach-walking feel, with the enormous granite boulder providing a memorable destination. Together with the challenging Mount Strzelecki Summit Walk, the two coastal walks provide an excellent introduction to the remarkably varied landscapes of Flinders Island.
The Castle Rock Walk combines many of the things that make Flinders Island special: empty beaches, clear water, enormous granite formations and a sense of isolation. There are no mountain summits to conquer or difficult climbs. Instead, the pleasure comes from following the coastline of Marshall Bay until the huge shape of Castle Rock finally appears beside the beach.
For walkers exploring Flinders Island, Castle Rock is an excellent half-day coastal walk and a worthy inclusion among Tasmania’s 60 Great Short Walks.
A demanding loop over Mount Killiecrankie to the remote Stacky's Bight and Old Man's Head rock formation.
