Situated on the boundary between four major biological zones, Tallong has a remarkable natural diversity of wildlife and plant species. It is here that travellers pass north out of the ancient folded rocks of the Lachlan Fold Belt into the puddingstones and sandstones of the Sydney Basin. Rare plants such as the Tallong Midge Orchid (Genoplesium plumosum) are found here, scribbly gums change from the inland species to the coastal types and tall forest gums nestle at the base of strange rock formations topped with stunted heath.

Barbers Creek runs through the little valley where it was dammed to supply water for the old steam trains, forming a wetland rich in wildlife including waterfowl, platypus and tortoises.