This mixed-use national park is home to small swatches of primary rainforest, but also includes plantations such as the Nirmala Tea Estate. The park's best feature is the rich montane forest in the highland regions around Gunung Halimun (1929m), its tallest peak. The big drawcard is white-water rafting. In Jakarta, Pt Lintas Seram Nusantara organises white-water rafting on the Class II to IV (depending on season) Sungai Citarak on the southeastern edge of the park; a full-day excursion is 485,000Rp.
The usual access (you need your own transport) is through Cibadak on the Bogor–Pelabuhan Ratu road, from where you turn off to Cikadang and then on to the Nirmala Tea Estate. Rainfall in the park is between 4000mm and 6000mm per year. Most of this falls from October to May, when a visit is more or less out of the question.
Speak to the staff at the tourist board in Bogor about setting up a trip to Halimun.
