The federally listed as threatened California red-legged frog is present in the northern reach draining the south slopes of Annadel State Park.

As the Piako River progresses north, it is feed by numerous small streams draining the eastern slopes of the Hangawera Hills.

A series of short rivers, including the Mattole, Gualala, and Navarro rivers, drain the western slopes of the range.

The swamps are fed by the Kinyeti River and others that drain the northern slopes of the Imatong Mountains.

It is formed from several streams which drain the northern slopes of Monte Colombano and converge near Varisella.

It is fed by a number of streams which drain the eastern slopes of Drum, a mountain in the Carneddau range.

Its tributaries drain the slopes east of Toowoomba and areas to the north of Gatton.

Its tributaries Willybrag Gill and Drycloff Gill drain the slopes of the fell.

It is one of several glaciers which drain the eastern slopes of the Explorers Range and flow to Ob' Bay.

The Kinyeti river, and others that drain the northern slopes of the mountains, feed the Badigeru swamps.