Endau-Rompin National Park is a protected tropical rainforest situated within a massif in the southern foothills of the Tenasserim Hills, straddling Segamat and Mersing Districts in northeastern Johor and Rompin District in southern Pahang. It covers a total land area of approximately 870 km², making it the second-largest national park in Peninsular Malaysia after Taman Negara. It has approximately 26 km of trail. It is the second national park proclaimed by the government of Malaysia. Gunung Besar, the second-highest peak in Johor, is in the park.
The park takes its name from the Endau and Rompin rivers that flow through the park. Other rivers that flow through the park are the Segamat, Selai, and Jasin.
There are two official entry points to the park: the Kampung Peta entrance located along the eastern boundary in Mersing District, and the Selai entrance at the southwestern boundary in Segamat District.
During the monsoon season from November till March, the park is closed to the public. Fishing is banned from September till October during mating season.