In B.E. 2541 Chanthaburi Province sent a document to the Royal Forest Department to inform that Pakhunsong National Reserved Forest, in the local of Khunsong sub-district, Kaenghangmaeo district, Chanthaburi province that appropriated becoming to be a National park. Because of the fertile of evergreen forest in the plain area and it is still near Khao Ang Ruenai Wildlife Sanctuary and Khaosoidoi Wildlife Sanctuary that is critical area to destroy and to trespass, composed it is evergreen forest which is the nearest Bangkok, for study and travelling of the people so appropriated setting to be a National Park for protection natural resources and for response the intention of the King to protect forest and wildlife in 5 provinces. (The east)

Later, the Royal Forest Department sent the order to explore an area for evaluation established to be a National park. From the report informed that Pakhunsong National Reserved Forest is in the local of Khunsong sub-district, Kaenghangmaeo district, Chanthaburi province. With about area 120 sq.km. Highlight trait is evergreen forest in the plain area with the waterfall, beautiful scenery view point in high biodiversity. So it appropriate to be a relaxing place, visiting place or the research in the fitting area. By use the name of Khao Siphachan National Park.

Mostly is vast plain area. The area is connecting mountainous from the north adjoining the south and the summit of Khao Siphachan is in the West Side with 802 m high above msl, in the north is connecting Khao Ang Ruenai Wildlife Sanctuary , there were many of canals through this forest, Khlong Tanot is the main canal with its large and dept and amount of the stream. Moreover there is still Khlong Tanot canal in the north.

Khao Sip Ha Chan Waterfall

Namtok Khao Khao Sip Ha Chan (ex name is Namtok Nampen or Namtok Khlongsai) is the moderate sized waterfall with 23 levels with stream all year. Far away from Kaenghangmaeo district office about 35 km which near Sakaeo province. Access and travel is only in dry period. There is natural trail for study that was prepared by National park with about 4.8 km.

Khlongsaba Waterfall

The small sized waterfall with 6 levels, is about 6 km on the east of National Park.

Madueaku camp area

The plain grassland is about 14 kms on the west of National Park. Able to pitch a tent for relaxing, watching the star and enjoy the nature due to this area is near Khao Ang Ruenai Wildlife Sanctuary so a lot of wildlife.