Thomson-Pfitzner Plaster Trail

How to get there

1. Inneston is a short drive from Stenhouse Bay on the internal park road (2WD when dry).
2. For a one-way walk, leave a car at Stenhouse Bay and start at Inneston (or the reverse). Confirm both car parks before you commit.
3. Without two cars, walk out-and-back from one end and turn around at a signed point — do not assume a hitch back.
4. Do not treat lodge driveways as public parking.

How to do it (step by step)

1. Read the unstable-structures signs at Inneston before you start.
2. Follow the old railway alignment and interpretive signs toward Stenhouse (or the reverse).
3. Carry water for a 3-hour exposed walk. There is little shade.
4. Turn around with time for the reverse if you are out-and-back — 7.6 km return is a planning figure, not a race.
5. If you only want ruins, do the 2 km Inneston Historic Walk instead of the full Plaster Trail.

What to expect

This is the park’s heritage long walk: gypsum, timber rail, and the story of how plaster left Inneston for Stenhouse Bay. It is a moderate 7.6 km return (or a one-way with a shuffle), not a cliff lookout loop.

Interpretive signs do the history heavy lifting. Your job is water, heat discipline and staying off ruins.

If ruins plus a short walk is the goal, do the Inneston Historic Walk and skip the full railway. You can always come back with better heat windows.

Logistics and car shuffles

You can start at either end. Two cars make a one-way walk easy; with one car, go out and back and turn around in time. Confirm both car parks before you commit to a shuffle.

Start at Inneston if you want the ruins first; start at Stenhouse if you want to finish at the Visitor Centre and jetty with toilets nearby.

This is still a park day-walk under vehicle entry rules. Overnight lodge guests do not get a private railway — same track, same heat.

Hazards

Unstable historic structures at Inneston. Look from the path. Do not enter, climb or lean on ruins for photos.

Exposure and length. Three hours of heath and railway alignment in January without shade is a different product from a cool winter morning.

Snakes in warm months. Stay on the formed track; do not short-cut through long grass.

What to pair

Strong pair: Inneston Historic Walk first (short ruins loop), then decide whether the full Plaster Trail still fits energy and water.

Weak pair: Plaster Trail after a morning of Pondalowie surfing and Royston Head. That is a full day of different hazard classes stacked for no good reason.

Orientation

Map

Pin may be approximate. Confirm trailheads, parking and track status on Parks SA before you drive. Gym Beach is a separate road from the Stenhouse–Pondalowie internal network.

More maps & free downloads →

Extra tips

• Strong pair with the Inneston Historic Walk if you have a heritage-focused day.
• Summer heat makes this a morning walk, not a midday one.
• One-way with a shuffle finishes at services if you end at Stenhouse — useful for families.
• Screenshot the walks PDF; do not invent shortcuts through ruins or heath.