Pararawen

Pararawen is a Strict Nature Reserve (Cagar Alam) of about 58.55 km² (5,855 hectares) in the interior of Central Kalimantan, Indonesia, in Barito Utara Regency near the town of Muara Teweh, about 25 km away. ^[1] Formally confirmed by Ministry of Forestry Decree No. 85/Kpts-II/1999 dated 25 February 1999, it protects lowland and hill tropical rainforest along the Barito River basin. ^[1] As a strict nature reserve, it is set aside primarily for the preservation of natural ecosystems and scientific value, with public access tightly restricted and managed by BKSDA Central Kalimantan. The reserve, divided into Pararawen I (2,015 ha) and Pararawen II (3,840 ha), safeguards a sample of Bornean interior forest in a region under pressure from logging and land conversion.

Pararawen's rainforest supports characteristic Bornean fauna including primates such as macaques and langurs, smaller mammals, and a diversity of forest birds, reptiles, and amphibians. Camera traps confirmed the presence of Bornean orangutans in the reserve for the first time in 2022, a significant biodiversity finding for the area. ^[1] As an undisturbed interior reserve in the Barito basin, it provides refuge habitat connectivity for species dependent on intact lowland and hill forest.

The reserve is covered by tropical lowland and lower-montane rainforest typical of Borneo's interior, including dipterocarp-dominated stands with a tall canopy, emergent trees, and a rich understory of palms, rattans, ferns, and epiphytes. These forests harbor high plant diversity and play an important role in protecting watershed and soil in the hilly Barito terrain. Riverine and valley vegetation along streams adds to the habitat variety within the reserve.

Pararawen lies in the hilly upland terrain of the Barito River catchment in central Borneo, where folded sedimentary and older basement rocks form ridges and valleys. The landscape consists of forested hills cut by streams draining toward the Barito, with soils derived from weathered bedrock under heavy rainfall. The undulating topography and steep slopes make the area important for watershed protection and limit accessibility.

The reserve has a humid tropical rainforest climate with consistently warm temperatures, typically in the mid-20s to low-30s Celsius, and high rainfall distributed throughout the year. The wettest period generally accompanies the northwest monsoon from roughly November to April, while a relatively drier interval occurs around the middle of the year. Persistent humidity and frequent rain sustain the dense interior forest.

The Barito basin around Muara Teweh is a homeland of Dayak communities, particularly Ngaju and related groups, whose livelihoods have long depended on the river, swidden farming, and forest resources. The Barito has historically been a major transport artery linking the interior to the coast at Banjarmasin. Surrounding lands have seen pressure from timber and resource extraction, which heightened the importance of setting aside protected forest blocks such as Pararawen.

Pararawen was first designated as a nature reserve in 1979 and formally confirmed through Ministry of Forestry Decree No. 85/Kpts-II/1999 with a total area of 5,855 hectares. ^[1] It is administered by BKSDA Central Kalimantan under Indonesia's protected-area framework. The cagar alam designation prioritizes ecosystem preservation and research over tourism, reflecting concern for the region's diminishing intact forest.

As a strict nature reserve, Pararawen is not developed for general tourism and has no formal trail network or visitor attractions; entry is generally limited to research and management purposes. Its value lies in the intact hill rainforest, biodiversity, and scenic forested ridges of the Barito interior. Any approved visits typically require permits and are scientific or conservation-oriented rather than recreational.

The reserve lacks tourist facilities and is accessed via Muara Teweh, the regency capital about 25 km away, which is reachable by river and road from Banjarmasin or Palangka Raya. Because it is a cagar alam, casual visits are restricted; researchers or officials must coordinate with BKSDA Central Kalimantan for permission. Surrounding infrastructure is limited, in keeping with the reserve's protective purpose.

Conservation efforts focus on preserving the reserve's undisturbed rainforest and watershed in a region affected by logging, mining, and agricultural expansion. Threats include encroachment, illegal logging, and fire risk during dry periods. BKSDA Central Kalimantan manages the area to maintain its ecological integrity, with the strict reserve status providing strong legal protection against development and helping safeguard biodiversity and water resources for surrounding communities.