Fernhook Falls is more a series of cascades than a single waterfall, and is a lovely spot to visit in the rainy season. In a remote patch of native forest, the Deep River tumbles over rocks through a number of lush pools. The Deep River has its beginnings 52 km north near Lake Muir and flows through forested areas of National Park including the Walpole-Nornalup National Park and meanders another 42 km before discharging into the Nornalup Inlet. Deep River is one of the purest rivers in the south West because 95% of its journey is through forested catchment areas.
The falls are easily reached up a good gravel road, about 6km from the main highway. We hadn’t seen a single car all day. At the car park a trail took us through the bush to the biggest cascade, where the river descends under the road bridge. It wasn't really cascading, rather just a little trickle stream, but still very pretty, relaxing and peaceful.
The water may not drop a great height, but after rain in winter and spring the horizontal expanse of the main falls and surrounding rapids can be a delightful sight. And a delightful sound too; one not often experienced in the WA bush. It was so quiet with only the sounds of trickling water. There were numerous small cascades which provided us the opportunity for us to go rock-hopping to find different viewpoints.
Continuing downstream, the trail passes other cascades and ends up at Rowel's pool. There was a great trail/walkway to follow down the river with toilets and an interpretative centre at the carpark.