Undulating ranges surround basalt outcrops, basalt plains and seasonal swamps. Ironbark woodlands provide habitat for grey kangaroos, abundant birdlife and many other native animals.

Within Blackbraes National Park are two resources reserves—Moonstone Hill and Kennedy Road Gravel. The park and two reserves cover about 52,000ha, and straddle two bioregions—the Einasleigh Uplands and Gulf Plains. Undulating hills and ranges surround basalt outcrops, black soil plains and seasonal swamps. The park and reserves are above 850m elevation providing a wetter and generally cooler climate compared with the surrounding country.

Moonstone Hill Resources Reserve—a volcanic vent—is popular for fossicking gem-quality feldspar called moonstone. Moonstone emits a silvery-white to blue colour when turned in certain directions. Fossicking in the reserve requires a licence.