In every way the highlight of the Gede Pangrango National Park is the climb to the peak of the volcanically active Gunung Gede (2958m). From the top of Gede on a clear day you can see Jakarta to the north, or, more enticingly, the sensuous south coast of Java.
Because it's close to Jakarta, this is an extremely popular mountain to climb. Numbers are restricted and during peak holiday season there may be a waiting list. At other times you can normally just rock up and trek the next day.