To reach this cache, go bush from the trailhead coordinates through fairly open forest. Once away from the road, there are vestigial tracks and several large clearings (reference points R1-R4) that'll avoid most of the thick scrub. Head for the "Sentinels" reference point (R5), where a narrow track passes between two old fire-ravaged Blackbutt trees. Here you can either go straight ahead and across the creek above the cascade (watch for slippery rocks), or down to the right across a small gully and around onto the lower rock platform that the creek flows under. At GZ look for a magnificent red gum growing sideways out of the rock.
The container is a 380ml Sistema with a pencil included. After signing the log, take the time to explore the cascade; there's a nice little sinkhole in the top shelf where a lot of the water gurgles down through the rock.
The cache and waypoints are in a public reserve, but be aware there's private property about sixty metres south of GZ so don't stray too far off course.
A lot of water can come down here during and immediately after heavy rain so it's best avoided then.