The Serudong Association is restricted to the in the Maliau Basin (in the southeast of the Pensiangan District and in the headwaters of the Sg Serudong, west of the Tawau District.)
It occurs on long moderately steep dip slopes of hills and mountains at altitudes ranging from about 750 m to 1,650 m. These are formed from sandstones of the Tanjong Formation and are mainly clothes in low heath forest.