Also visible from this trail is Kahūnā Falls, a 300-foot (91 m) tall waterfall, and several smaller cascades.

A large stone in the stream about 70 feet (21 m) upstream of the falls is called Pōhaku o Kāloa.

[3] The ʻoʻopu ʻalamoʻo is an endemic Hawaiian species of goby fish that spawns in stream above the waterfall, but matures in the sea.

These fish have a suction disk on their bellies that allows them to cling to the wet rocks behind and adjacent to the waterfall.

[4] A shrimp called the ʻōpaekalaʻole has also evolved to climb ʻAkaka Falls and live in Kolekole Stream.