Bunyip State Park is a 166-square-kilometre state park 65 kilometres east of Melbourne, near the town of Gembrook, in the southern slopes of the Yarra Ranges.
Starting from Mortimer Picnic Ground this Four Brothers Rocks hike follows the old (and non existent) Hacket Track to the junction of Windy Point Road. Turn left onto Burgess Road and follow this to Four Brothers Rocks, a collection of large, granite rocks offering sweeping views across the park.
From Four Brothers Rocks join Nichols Hut Track and follow it down the spur. The last leg of the journey is along Silvertop Ridge Track and Ferres Track, and back to Mortimer Picnic Ground.
Drive 38km to Belgrave along the Burwood Highway and continue a further 24km to Gembrook. Drive through town (towards Beenak East) and along the unsealed Gembrook-Tonimbuk Road for 7km to Mortimer Picnic Ground on the left.
Max elevation: 431 m
Min elevation: 152 m
Total climbing: 572 m
Total descent: -574 m