Part of the mulga lands bioregion this is an area of dry sandy plain with small trees and shrubs.

[4] Lakes Numalla and Wyara within the park are listed as Ramsar wetland sites of international importance.

[2] These provide significant waterbird habitats at times of drought and for migrating waders which travel across inland Australia.

[4] A feature of the park is a 25 km2 (9.7 sq mi) bilby enclosure surrounded by a predator-exclusion fence.

The fence was damaged by flooding in late 2011 and early 2012, allowing feral cats into the area.