Len Howard Conservation Park on the shores of Peel Inlet in Mandurah is a great place for bush walking and bird watching.
There is a 2km loop easy walk trail, which can be extended further and done as a 6 km return trail. It goes through the bush and wetlands along the inlet. A few benches are along the way to sit down and rest, while appreciating nature. The park is part of Peel-Yalgorup Wetlands, that support quite a number of water birds, as well as migratory birds.
Australian Pied Oystercatchers were the highlights for me during this walk. Apparently, they feed on worms too, not just oysters!
Toilets and picnic facilities are available at this location and you can take your dog on a leash for a walk.
Len Howard Conservation Park is located in Mandurah, 1 hour drive from Perth. It can be included as part of your day trip to Mandurah. Alternatively, it is a short drive from Herron Point campground, if you like nature based camping.