Sphinx Rock is an unusual rocky outcrop in the Mornington Peninsula National Park, at the southern end of the Portsea Surf Beach, about 70 km south of Melbourne.

I visited the Rock on Monday April 27 2009, a bleak, windy and overcast day!

I started at the upper car park at the end of Back Beach Rd, Portsea, then descended to the beach, passing the Portsea Surf Life Saving Club.

From there, I continued along the beach and the windswept sand dunes to the Rock itself, and up a wooden staircase to a viewing platform.

From there, I returned to home base, a distance of about 4 km.

This walk forms part of the long 24 km South Coast Trail, which extends from London Bridge (Portsea) to Cape Schanck.

The viewing platform can also be reached from a walking track from the end of Normanby rd, Sorrento, or from the carpark at the end of Ocean Beach Rd Sorrento.