Ellis Brook Valley Reserve, which is part of the Banyowla Regional Park, is a Perth walking gem. If you come at the right time of year (later winter and spring and rain-dependent) you will be amazed by probably the best natural display of wildflowers in the Perth metropolitan area (see the photographs below for just a small selection of the display).
Apart from wildflowers, Ellis Brook Valley Reserve is also well known for the dramatic cliffs and emerald green waters of Old Barrington Quarry. The panoramic views from the top of Sixty Foot Falls are also a highlight.
Ellis Brook Valley caters for all abilities, with the wheelchair accessible Easy Walk Trail (symbolised by a red echidna) and the slightly more difficult Blue Wren Ramble Trail and Eagle View Trail (symbolised by a blue wren and green eagle respectively). For the more adventurous types, there is also the Sixty Foot Falls Trail (symbolised by an orange goanna) which obviously takes you to the top of Sixty Foot Falls but also passes by the cliffs of the Old Barrington Quarry. For more information on the individual trails please visit Gosnells.wa.gov.au which provides maps in .pdf format.
The route I suggest is provided in the map above. It includes almost all the trails (a little bit of Easy Walk Trail is missed) but also additional sections and a walk along Rushton Road to make the route a loop which starts and finishes at the entrance to Ellis Brook Valley Reserve.
So, let's start at the entrance on Rushton Road and walk in a clockwise direction (which leaves the Eagle View Trail, probably my favourite section, for last).