Alamat Hutan KHDTK Samboja serves as a data center for biodiversity, tourism, education, and development, utilizing a WebGIS platform to collect and enrich data through surveys and research, accessible online for analysis.
Initially, Wanariset Samboja Forest was part of PT Inhutani's forest area based on the Decree of the Director General of Forestry on February 11, 1979. This area was designated as a Research Forest with an area of +500 Ha, located between S. Saka Kanan and S. Mardika, East Kalimantan. Subsequently, field boundary demarcation was recorded in the Boundary Demarcation Minutes on August 11, 1979, and ratified by the Minister of Agriculture on September 24, 1979. As a result, this area was officially designated as the Wanariset Research Forest with an area of 504 Ha through the Decree of the Minister of Agriculture No. 723/Kpts/Um/II/1979.
On June 5, 1991, the area was expanded by +3,000 Ha to a total of 3,504 Ha through the Decree of the Minister of Forestry No. 290/Kpts-II/1991. The expanded area included part of the Bukit Soeharto Nature Tourism Forest covering 61,850 Ha. The boundary expansion process was carried out by the Regional IV Forest Inventory and Mapping Agency (BIPHUT IV). Temporary boundary demarcation took place from August 25 to September 13, 1992, while definitive measurements were completed from September 24 to October 8, 1992, with a total area of 3,120 Ha.
The Wanariset Research Forest was then designated as the KHDTK Samboja Research Forest through the Decree of the Minister of Forestry No. SK.201/Menhut-II/2004. This area covers 3,504 Ha and is part of the Bukit Soeharto Nature Tourism Park in Kutai Kartanegara and Penajam Paser Utara Regencies, East Kalimantan. This designation marked the beginning of KHDTK's function as a center for research and specialized forestry activities in the Samboja region.
From November 5-25, 2005, boundary reconstruction of the KHDTK was carried out to ensure clarity of boundaries in the field. This activity was conducted by BIPHUT Region IV Samarinda together with the Samboja Primate Research and Development Station. The results were documented in the KHDTK Samboja Boundary Reconstruction Report, aimed at restoring physical boundaries such as lines and markers to their original state.
KHDTK Samboja is located at coordinates 0°56'36.15" – 1°00'6.18" S and 116°53'51.46" – 116°58'51.12" E, spanning Kutai Kartanegara (83%) and Penajam Paser Utara (17%) regencies in East Kalimantan. The 3,504 Ha area includes Sungai Merdeka and Semoi Dua villages.
KHDTK Samboja’s forests include primary and secondary areas, with young and old secondary forests dominating due to past human activities like plantations and fires.
Primary forests host 135 tree species from 42 families, with Dipterocarpaceae species like Shorea laevis (IVI 38.78%) dominating (Atmoko et al., 2014).
Secondary forests feature 178 species from 43 families, led by Euphorbiaceae, with species like Litsea firma (IVI 48.50%) most prominent (Atmoko et al., 2014).
The Wartono Kadri trail hosts mammals like Mueller's gibbon, sun bear, and sambar deer (Atmoko et al., 2015).
At least 140 bird species from 32 families, including endemic Bornean Blue Flycatcher, inhabit the area (Eve and Guigue, 1987).
Herpetofauna includes 18 species, such as pythons and frogs, with releases by BKSDA enhancing biodiversity.