The park contains a broad range of vegetation communities, with the Ecological Vegetation Classes (EVCs) of the area including herb-rich foothill forest, grassy dry forest, damp forest and riparian forest. The vegetation ranges from Manna Gum Tall Open Forest found along the banks of Little River to Myrtle Beech Closed Forest found above 900 m. The dry rocky slopes are covered with open forest, with the main species being red stringybark ("Eucalyptus macrorhyncha"), broad-leaved peppermint ("Eucalyptus dives") and long-leaved box ("Eucalyptus goniocalyx"). The moist river valleys contain candlebark gum ("Eucalyptus rubida") and narrow-leaved peppermint ("Eucalyptus radiata"). The summit of Sugarloaf Peak contains a community of snow gum ("Eucalyptus pauciflora") and just below this is a community of alpine ash ("Eucalyptus delegatensis") extending down to the Sugarloaf Saddle.