Mahale Mountains National Park, along with Gombe to the north, is one of the most remote in Tanzania. It is home to a population of chimpanzees, approximately 900, that have been habituated to human visitors by a Japanese research project founded in the 1960s. The striking mountains, covered in dense montane rainforest, rise sharply from the shores of Lake Tanganyika and provide a stunning backdrop to this exhilarating park. The dry season (May -October) is the best period in which to visit Mahale Mountains National Park. During this time, chimpanzees are likely to be seen in big groups, the sunshine illuminates the fish in the Lake and the beach is an inviting place to relax. However, a visit in the rainy season can also be a memorable experience, made remarkable by views of the neighbouring country DR Congo across the water and by incredible lightning storms that light up the lake at night.