Extensive sand dunes are a feature of the St Helens Point Conservation Area (1066 ha). In the past, the introduced marram grass Ammophila arenaria has been used to help stabilise eroding dunes. Where it occurs, the native grass Spinifex hirsutus also plays an important role. Its sand-binding ability prevents sand from moving inland and allows more complex plant communities to develop.
The sand dunes can be damaged by both foot and vehicular traffic. This can lead to 'blowouts' and damage to the sensitive beach environment. For this reason vehicular use is restricted to an area set aside at Peron Dunes.
Toilets with wheelchair access are available.