The national park is a recreational resource, and features rainforest, beaches of white and golden sand, and rocky beaches, facing the South China Sea.
The park is rich in flora and fauna. The park was first gazetted on 1 December 1976, and published on 20 April 1978. It originally comprised 70.64 km2 (17,460 acres) of forest, starting from Sungai Likau in the south and stretching 30 km (19 mi) to Sungai Similajau in the north. Another 19.32 km2 (4,770 acres) was added to the park on 17 February 2000, making the total area 89.96 km2 (22,230 acres), in a narrow coastal strip.
For nature lovers, Similajau National Park provides nature trails. As you trek along the trail you will feel the tranquility of the forest. You are not lonely but are entertained by the music from the friendly insects and beautiful whistling of the birds. The thick forest canopies provide you with fresh air and shades as you walk along.
If you love watching, bring along a pair of powerful binoculars, zoom-lens cameras and pocket guide book. There are plenty of birds (both small, medium and large birds) around the park. Notably the black hornbills are always around.
Snorkeling can be carried out along the shore line of the park beaches. There are plenty of rocks where we can see different kinds of marine life such as lobsters, shells, crab, fishes.
Sea & River Cruising: A river cruise is usually carried out along the Likau River and sea cruise to Batu Mandi and as far as Golden Beach.