The Brave Pants were on today as we tackled the giant granite boulders known as Castle Rock in Porongurup National Park 48KM northeast of the beachside town of Albany. We had been saving this walk and climb for an improvement in the weather and the forecast today was spot on with the sun breaking through around midday.
Granite Plutons
The Porongurup Range within Porongarup National Park is a 12KM long chain of granite domes reaching a height of 650-metres. While they may not be the tallest of peaks in the region – that honour goes to the Stirling Ranges – they certainly make up for it in inclination as we were about to find out. The granite domes are the solidified remains of an enormous bubble of molten rock formed deep underground known as a ‘pluton’.
Millions of years of erosion by the elements and the remnants of the pluton was all that remained above ground. Continuing exposure to the weather created cracks in the rock forming giant stone cubes much as those seen at The Gap. Further erosion by wind and rain rounded-off the blocks leaving circular domes and giant precariously balanced boulders. In extreme cases even valleys were cut into the pluton creating ideal slopes for the many small wineries in the region.

Up in the Air
The Granite Skywalk Trail is not to be taken lightly with an almost continuous 2KM uphill climb from the car park. Good walking shoes or boots are essential and a walking pole is highly recommended. The trail zigzags its way through Marri and Jarrah woodland providing good shelter from the sun and wind of which there was plenty of both today.
As the walk reaches higher ground enormous Karri trees make an appearance giving a welcome excuse to stop, catch your breath and wonder at the age of these immense trees. It’s unusual to see Karri trees at this altitude but the low annual rainfall here is boosted by water running-off from the granite’s non-porous domes and providing just enough for the Karris to survive in such a dry area.
Finally reaching the huge Balancing Rock, carefully supported by Catherine, and the bush opens up to a stunning 180-degree view from the lower observation deck with Albany to the left and right around to the Stirling Ranges 20KM further to the North. But the real highlight is right above and behind us – The Granite Skywalk. It is this that gives the trail its rating of severity a Grade 5.

The last 100-metres of the trail to reach the Skywalk requires a quite strenuous and often exposed scramble across granite slabs using the provided steel hand/foot holds before climbing a steep steel caged ladder with vertigo inducing drop-offs to the right. The top of the ladder connects to the final narrow walkway platform bolted along the side of two massive granite domes. And the reward? A full 360-degree but fearful view.
Now I’d like to say the view from the top of the Skywalk is spectacular and in today’s sunny but cool weather I’m absolutely sure it is but I have to confess the last few steps of the ladder got the better of me. It was very windy and very exposed to the right.

Catherine had already decided to stay at the first platform level avoiding the scramble. But I’ll forever kick myself for going to all the effort to climb the hill and stopping less than two metres from the top. Maybe I just wanted to save it for another visit.
The Granite Skywalk is highly recommended though it is not for everyone. You need a good level of fitness, sensible shoes, plenty of water and above all a head for heights if you want to reach the very top.
Park Pass Required
Don’t forget this is a WA National Park and a Park Pass is required to be displayed in your vehicle. A day pass can be purchased from the automated machine at the start of the walk.











