We’ve known about the Platypus Track, that starts behind Eric Mobbs Reserve, for a while now. But at just over 2kms, we waited until the kids legs were a little longer, and more willing, before attempting it. And what a gem!

The Platypus Track is definitely one of our favourite bushwalks now to do with the kids. It’s one of those few suburban bushwalks where you feel a million miles away! And there’s an extra special treat in spring when the wildflowers bloom.

Eric Mobbs Reserve Castle Hill

I’m also glad we waited a little bit to do it as the track takes you down into a valley and back up again and it’s more suited to kids 4yrs+ – unless you are happy to carry them part of the way.

Eric Mobbs Reserve Castle Hill

And while we had heard a about Platypus Track, we hadn’t heard that much about Eric Mobbs Reserve, which serves as a lovely gateway to the walk.

Eric Mobbs Reserve Castle Hill
Map of Eric Mobbs Reserve (photo credit: The Hills Shire Council)

There’s a great fenced playground, considering its size!

Eric Mobbs Reserve Castle Hill

Within a small amount of space, there is a really good mix of play equipment for a range of ages.

Plus there is natural shade over the playground and a picnic table on the outside, nearby.

Eric Mobbs Reserve Castle Hill

There are also toilets, BBQs and four sportsfields at Eric Mobbs Reserve. And we can imagine it gets busy on weekends when sports games are being played.

We enter via Ferguson Ave, and drive into the reserve, going past the Scout Hall and Mens Shed. Here you’ll find a large carpark.

Eric Mobbs Reserve Castle Hill
Hills Men Shed

The Platypus Track in Bidjigal Reserve actually starts at the end of Excelsior Ave. From the fenced playground in Eric Mobbs Reserve, walk in between the sports fields (1&2) towards the toilets. Then keep following the road down the hill and once at the gate at the bottom, go right. You’ll walk along a little bit and then see the sign for the Platypus Track.

Eric Mobbs Reserve Castle Hill

The track is actually a loop. And we HIGHLY recommend going right of the sign. After walking along the ridge of the valley for a while, this way takes you slowly down via stairs. But we wouldn’t want to come back up this way. Thankfully going this way means there’s just a short sleep climb at the end.

Make sure to keep following the blue platypus track signs, otherwise you’ll end up on a longer path.

Platypus Track Eric Mobbs Reserve Castle Hill

You will eventually reach the Darling Mills Creek and we love stopping here for a play and picnic.

The path from here is pretty flat, though narrow in parts and also with access to the creek in some bits.

There are a few spots along the way that we like to stop for another little play and refuel.

You’ll cross a bridge and then after a while come to a fork in the path, which unfortunately isn’t marked. Make sure to go on the stepping stones across the creek, where the blue Platypus Track markers start up again.

There is now a short, but steep hill to get back to the start of the Platypus Track.

Eric Mobbs Reserve Castle Hill

It usually takes us about 2hrs to complete the 2.2kms loop, with preschoolers and young primary school kids and lots of stops along the way.

Eric Mobbs Reserve Castle Hill

Finding Eric Mobbs Reserve

We prefer to drive into Eric Mobbs Reserve and park at the carpark, past the Mens Shed. Entry is on Ferguson Ave, where you will also find parking.

Places of Interest Nearby

  • TAFE NSW – Baulkham Hills Campus
  • Waves Aquatic Centre
  • Stockland Baulkham Hills, with a shaded fenced play area in between Little Rock Cafe and Charlie Lovett Cafe
  • Baulkham Hills Sports Club