Bon Irau Jungle

Bon Irau rises to 2,501 metres in the Tamrau Mountains of New Guinea's Bird's Head Peninsula. It is the highest summit in the range and the highest point in Southwest Papua outside the Arfak Mountains. Its prominence makes the peak a landmark across the north-central part of the peninsula, where mountain ridges, dense tropical forest and isolated valleys break up the terrain.

The mountain stands about twenty kilometres from the grassy Kebar Valley. This proximity creates a sharp contrast between the exposed high summit and the open valley below. Dense forest covers much of the surrounding country and shelters a wide variety of birds, including species associated with the Vogelkop montane rain forests. Ridges and steep slopes make travel difficult away from established routes.

Bon Irau's height and isolation help explain its importance to the wider landscape. It forms a watershed landmark above the surrounding valleys and appears as a fixed point in an environment where settlements and paths sit below the mountain rim. The peak's sparse human use gives greater weight to its ecological role and to the valley communities that depend on water and forest products around the massif.