The park is the largest tropical lowland rainforest protected area in central Kalimantan. It has very complex flora and fauna, affected by an equatorial climate with maximum and minimum temperature ranging from 18-20°C low to 31-33°C high. Rain fall is 2,000 to 3,000 mm per year; dry season occurs in July to September. The six types of vegetation found in the park are: Dry land Dipterocarpus forest; Peripherial mixed swampy forest; Shore blangeran forest; Keranggas forest; Costal mangrove forest; and Secondary forest